Classic raid instance bosses This page contains a short overview of all Instance Bosses that were in game since before the release of the . These bosses are considered Raid Bosses since it takes more than a party of 5 players to down them . Zul ' Gurub . In order to quell Hakkar the Soulflayer , the trolls of the land banded together and sent a contingent of High Priests into the ancient city of Zul ' Gurub . Each priest was a powerful champion of the Primal Gods , but despite their best efforts they fell under the sway of Hakkar . Now the champions and their Primal God aspects feed the awesome power of the Soulflayer . Any adventurers brave enough to venture into the foreboding ruins must overcome the High Priests and Hakkar ' s mighty lieutenants if they are to have any hope of confronting the mighty blood god . High Priestess Jeklik . One of Hakkar ' s priests , Jeklik holds the aspect of the bat . High Priest Venoxis . The troll Venoxis was the High Priest of the Primal God Ula - tek , the goddess serpent . High Priestess Mar ' li . The troll Mar ' li was the High Priestess of the Primal God Shadra , the god spider . High Priest Thekal . The troll Thekal was the High Priest of the Primal God Shirvallah , the god tiger . High Priestess Arlokk . The troll Arlokk was the High Priestess of the Primal God Bethekk , the goddess panther . Bloodlord Mandokir . One of Hakkar ' s more powerful lieutenants , Mandokir is the leader of the Gurubashi tribe trolls , the most powerful troll - tribe that resides inside the ancient city of Zul ' Gurub . Mandokir and his people were reluctant at first to summon Hakkar into the mortal world and revolted against the plan , but as soon as Hakkar entered the world their resistance seized and they soon fulfilled his every command . Jin ' do the Hexxer . One of Hakkar ' s most powerful lieutenants , Jin ' do was originally the leader of the Hakkari tribe trolls . After being exiled or murdered for the evil deeds they had done in Hakkar ' s name , they decided to wreak havoc upon the world and summon Hakkar into the mortal world . Jin ' do and the remaining Hakkari trolls now reside inside the walls of the ancient Gurubashi capital of Zul ' gurub . Gahz ' ranka . Gahz ' ranka is a giant sea - creature that lives in the waters of the ancient Gurubashi capital of Zul ' Gurub . The famous fisherman Nat Pagle hunted the creature for a long time , but apparently failed to capture it . Gather a group of heroes and maybe some lure . Who knows , maybe you ' ll succeed where Nat failed . . . Hakkar the Soulflayer . The long centuries following the Great Sundering of the world were difficult ones for the troll race . Famine and terror were commonplace within the broken kingdoms . The Gurubashi trolls , driven to desperate ends , sought aid from ancient , mystical forces . Though both of the troll kingdoms shared a central belief in a great pantheon of primitive gods , the Gurubashi fell under the sway of the darkest one . Hakkar the Soulflayer , a vile , bloodthirsty spirit , heard the trolls ' call and decided to aid them . Hakkar gave his secrets of blood to the Gurubashi and helped them extend their civilization across most of Stranglethorn Vale and certain islands of the South Seas . Though he brought them great power , Hakkar wanted more and more for his efforts . In recent times , the Atal ' ai priests discovered that Hakkar ' s physical form could only be summoned within the ancient capital of the Gurubashi Empire , Zul ' Gurub . Unfortunately , the priests have met with recent success in their quest to call forth Hakkar - - reports confirm the presence of the dreaded Soulflayer in the heart of the Gurubashi ruins . In order to quell the blood god , the trolls of the land banded together and sent a contingent of High Priests into the ancient city . Each priest was a powerful champion of the Primal Gods - - Bat , Panther , Tiger , Spider , and Snake - - but despite their best efforts , they fell under the sway of Hakkar . Now the champions and their Primal God aspects feed the awesome power of the Soulflayer . Any adventurers brave enough to venture into the foreboding ruins must overcome the High Priests if they are to have any hope of confronting the mighty blood god . Ruins of Ahn ' Qiraj . Kurinnaxx . Kurinnaxx , a large sand reaver , is the first boss found in the Ruins of Ahn ' Qiraj . He has a wide aggro radius and can see stealthed rogues . General Rajaxx . The mighty Qiraji known as General Rajaxx commands the Qiraji armies in battle . He was described in the War of the Shifting Sands as " a towering monstrosity , swinging clawed limbs , looming over all and always shouting commands to the insect soldiers of Qiraji and Silithid during battle . " He is currently a boss found in the Ruins of Ahn ' Qiraj . He is commonly thought to be Ragnaros ' s equal or greater in physical size . Moam . Though the Scarab Wall prevented the Qiraji from venturing out of Ahn ' Qiraj , the insect empire refused to remain idle . In preparation for their reemergence in the world , the shadowy master of Ahn ' Qiraj commanded Emperor Vek ' lor to create a new obsidian statue superior to all other Destroyers . Vek ' lor sought his twin brother ' s aid in the task , and while Vek ' nilash used his physical might to craft a grand body of volcanic rock , Vek ' lor fortified the shell with powerful magic . Emperor Vek ' lor named the finished construct Moam , and observed as the dark master infused it with life . He was pleased and surprised to find that the improved Obsidian Destroyer was far more versatile than its earlier counterparts . The Twin Emperors intended to use Moam as a colossal weapon , knowing that its strengths would help it survive in the thick of melee as well as magical combat - but they did not expect for the construct ' s abilities to advance further without their own assistance . Buru the Gorger . Buru guards the eggs of the Qiraji . It is only by the destruction of those eggs that Buru can be weakened until finally weak enough to break through his immensely thick armor . Ayamiss the Hunter . Ayamiss is a powerful flying hunter in the ranks of the Qiraji army . She and her soldiers hover high above the ground , and when confronted , Ayamiss gets great pleasure in sacrificing random members of the opposing forces . Ossirian the Unscarred . During the War of the Shifting Sands , as the Anubisath constructs crumbled under the dragonflight ' s assault , a single Anubisath did the seemingly impossible - he found a way to fight back . Ossirian targeted one of the leaders , the massive dragon Grakkarond , and hurled his obsidian sword through the beast ' s wing . The crippled wyrm descended , crushing the Qiraji as it fell . The dragon mauled Ossirian nearly to death , but the remaining Anubisaths and Qiraji now had a target on the ground to focus on , and they swiftly converged and overwhelmed the noble dragon . Ossirian ' s beaten body was dragged back to the Ruins of Ahn ' Qiraj following the battle , where he should by all rights have perished . It is whispered that Ossirian found the favor of the malevolent force that reigns over the Qiraji , for in spite of his wounds , the construct survived . Molten Core . Lucifron . Location : Molten Core Raid 40 The first of the five Flamewaker s defending Molten Core , Lucifron is the first 40 - man raid boss most players encounter . His attacks are all Shadow based , but Shadow Resistance is not needed in any way . His guards can mind control players , while he himself has an AoE Magic effect called Impending Doom that will deal 2000 Shadow damage if not dispelled quickly , as well as a Curse that doubles the mana / rage / energy cost of all abilities . Drops the Tome of Tranquilizing Shot , a necessity for future bosses . Magmadar . Location : Molten Core Raid 40 A favored pet of Ragnaros and progenitor of the Core Hound s that roam throughout the Molten Core . Goes into deadly frenzies that only Hunter s can dispel , has an AoE Fear , and occasionally throws Lava Bombs that ignite the surrounding area , dealing massive Fire damage . Killing Magmadar prevents Ancient Core Hound s that roam the instance from spawning . Drops all Tier 1 leg pieces . Gehennas . Location : Molten Core Raid 40 The second of five Flamewaker s defending Molten Core . Will call down a powerful Rain of Fire on his attackers , and also has an AoE curse that greatly reduces healing . Garr . Location : Molten Core Raid 40 A powerful Molten Rock Elemental that serves as one of Ragnaros ' lieutenants and is partially responsible for Prince Thunderaan ' s imprisonment . He is guarded by eight Firesworn elementals that he can combust at will . He also consumes buffs . Killing Garr prevents the Lava Surger s that roam the instance from spawning . Drops all Tier 1 head pieces and one half of the Bindings of the Windseeker . Baron Geddon . Location : Molten Core Raid 40 A powerful Firelord that serves as one of Ragnaros ' lieutenants and is partially responsible for Prince Thunderaan ' s imprisonment . Turns players into living bombs that explode after 10 seconds , dealing massive Fire damage to nearby allies and more often than not , killing the player . When near death , he starts a spell called Armageddon , which will likely kill anyone nearby should he succeed . Drops one half of the Bindings of the Windseeker . Shazzrah . Location : Molten Core Raid 40 The third of the five Flamewaker s defending Molten Core . Spams a powerful Arcane Explosion and casts an AoE Curse that reduces Arcane Resistance . Will also randomly Blink towards players . Golemagg the Incinerator . Location : Molten Core Raid 40 A massive Molten Giant , Golemagg is the keeper of the valuable Sulfuron Ingot s needed to form Sulfuras . He has two Core Hound pets that can not be killed until he dies . When low on health , he begins attacking much faster and causing earthquakes . Drops all Tier 1 chest pieces . Sulfuron Harbinger . Location : Molten Core Raid 40 The fourth of the five Flamewaker s defending Molten Core . His true name is not known . He is guarded by four Flamewaker Priests , who won ' t hesitate to heal Sulfuron or each other . Majordomo Executus . Location : Molten Core Raid 40 The fifth and final Flamewaker defending Molten Core , Executus is Ragnaros ' most trusted lieutenant , and will only appear once the protective runes throughout the Core are extinguished . His encounter is the first truly complex 40 - man encounter players encounter , calling for an interesting juggling of his eight guards . Once the guards are dead , Executus will surrender and leave to go summon Ragnaros himself . He leaves behind a chest of Epic loot , most notably items required for the Hunter and Priest epic quests . Ragnaros . Location : Molten Core Raid 40 One of the four Elemental Lieutenants of the Old Gods , Ragnaros is a being so powerful that his entrance into this world created the volcanic wastelands surrounding Blackrock Mountain . However , he is only a shadow of his former self , having been separated from the powers of the Elemental Plane when he was summoned into Azeroth . He is the final boss in Molten Core . High Fire Resistance is a must for those who wish to challenge him . Drops all Tier 2 leg pieces , as well as the primary requirements for the legendary weapons , Sulfuras and Thunderfury . Blackwing Lair . Razorgore the Untamed . Location : Blackwing Lair Raid 40 The most powerful known Dragonspawn in the world , Razorgore serves no master but himself . However , the dragon Nefarian found a way around that , creating a powerful orb that would allow the Blackrock Clan to control Razorgore , and uses the Dragonspawn to defend a clutch of Chromatic dragon eggs . He is the first boss in Blackwing Lair . The encounter involves using the orb to make Razorgore destroy the eggs , all while fighting off 40 other Orcs and Dragonspawn . It is known as one of the most chaotic encounters in the game , if not " the " most . Drops all Tier 2 bracers . Vaelastrasz the Corrupt . Location : Blackwing Lair Raid 40 Vaelastrasz the Red was the keeper of the red shard of the Scepter of the Shifting Sands . He had sworn to destroy the dragon Nefarian , but lost the battle inside Blackwing Lair , losing the shard as a result . The raid comes upon Vaelastrasz just as Nefarian completes his corruption , and the mighty red dragon is helpless as Nefarian orders him to kill his allies . However , before the corruption is complete Vaelastrasz gives the players a buff called Essence of the Red , granting them unlimited mana , rage , and energy . However , this buff only last three minutes , and is crucial to the encounter . The dragon will also give players Burning Adrenaline , which makes all their spells instant cast but also eventually kills them . Drops all Tier 2 belts . Broodlord Lashlayer . Location : Blackwing Lair Raid 40 A large black Drakonid , Broodlord Lashlayer oversees the suppression rooms in Blackwing Lair , keeping the many kidnapped dragon whelps in check . The encounter starts long before the raid even lays eyes on Lashlayer , as they battle their way through the complex suppression rooms . Drops all Tier 2 boots , and acquiring his head is the first of many steps in the quest to open the Gates of Ahn ' Qiraj . Flamegor . Location : Blackwing Lair Raid 40 The third of three black drake s found in Blackwing Lair . Like the other drakes , he uses Wing Buffet to reduce aggro , as well as the deadly Shadowflame , which needs to be mitigated by Onyxia Scale Cloak s . His unique ability is Fire Nova , a direct damage attack that hits all enemies within his line of sight . However , he uses this only when frenzied , which can be dispelled by Hunter s . Drops all Tier 2 gloves . Ebonroc . Location : Blackwing Lair Raid 40 The second of three black drake s found in Blackwing Lair . Like the other drakes , he uses Wing Buffet to reduce aggro , as well as the deadly Shadowflame , which needs to be mitigated by Onyxia Scale Cloak s . His unique ability is Shadow of Ebonroc , which applies a debuff to whoever is on top of the hate list . Whenever Ebonroc hits someone who has the debuff , he regains 25000 health . Drops all Tier 2 gloves . Firemaw . Location : Blackwing Lair Raid 40 The first of three black drake s found in Blackwing Lair . Like the other drakes , he uses Wing Buffet to reduce aggro , as well as the deadly Shadowflame , which needs to be mitigated by Onyxia Scale Cloak s . His unique ability is Flame Buffet , which applies a stackable Fire DoT to all enemies within his line of sight . Drops all Tier 2 gloves . Chromaggus . Location : Blackwing Lair Raid 40 The only known Drakeadon in existence . The encounter is largely random , as his two heads will each have a random breath attack , and he casts random Brood Afflictions , applying nasty debuffs to all players . His skin also " shimmers , " changing his vulnerability to certain schools of magic . Goes in frenzies that can be dispelled by Hunter s , and enrages at 20 % health . Drops all Tier 2 shoulder pieces . Nefarian . Location : Blackwing Lair Raid 40 Son of the Black Dragon Aspect , Neltharion , and lord of the black dragonflight . He allied the Black Dragon s with the Blackrock Clan , and is attempting to create a chromatic dragonflight . He also stole the red shard of the Scepter of the Shifting Sands from Vaelastrasz after defeating him , and threatened to destroy it . He is the final boss in Blackwing Lair . In Phase 1 of the encounter , players must fight off wave after wave of randomly colored Drakonid s , all while an invulnerable Nefarian wanders amongst the raid in human form , randomly shadow bolting , mind controlling and fearing people . Nefarian leaves shortly after . Once 42 Drakonids are killed , Nefarian returns in dragon form , opening up with a Shadowflame that hits all members of the raid . He will then proceed to randomly call out classes , forcing all players of that class to do something bad based on their class ( ie . forcing Druids into Cat Form , summoning hostile Infernals , etc . ) . At 20 % , he resurrects all the dead Drakonids as Bone Constructs . Drops all Tier 2 chest pieces . Onyxia ' s Lair . Onyxia . Daughter of the Black Dragon Aspect , Neltharion , and brood mother of the black dragonflight . When she isn ' t meddling in human affairs or plotting with her brother , Nefarian , she is in her lair in Dustwallow Marsh , fiercely protecting her eggs . Although small for a dragon her age , she is no less dangerous . The encounter is divided into three distinct phases . In the first phase , she is on the ground and is extremely difficult to tank . In the second phase , she takes flight and breathes fire down on her foes . In the final phase , she lands once again and begins fearing her attackers , all while the ground erupts beneath their feet . Drops all Tier 2 head pieces , as well the sinew required for the Hunter epic quest . The Temple of Ahn ' Qiraj . The Prophet Skeram . Location : The Temple of Ahn ' Qiraj Raid 40 Religious leader of the Qiraji and author of the Prophecy of C ' Thun , the Prophet Skeram is the first boss in Ahn ' Qiraj . Creates two mirror images of himself at 25 % health intervals , and both the images and himself can Blink , Earth Shock , and Arcane Explosion . He also casts True Fulfillment on random targets , mind controlling them while increasing their damage , movement and resistance , and making their spells instant - cast . Lord Kri . Location : The Temple of Ahn ' Qiraj Raid 40 One of the three optional Silithid Colossi found in Ahn ' Qiraj , players must fight Lord Kri at the same time as Princess Yauj and Vem . Loot received from the encounter depends on the order the Colossi are killed in , and killing Lord Kri last is the hardest method and yields the best loot . He has an AoE Toxic Volley that hits all players in the room for Nature damage while applying a Poison DoT . When he dies , his corpse leaves behind a deadly toxic cloud . Princess Yauj . Location : The Temple of Ahn ' Qiraj Raid 40 One of the three optional Silithid Colossi found in Ahn ' Qiraj , players must fight Princess Yauj at the same time as Lord Kri and Vem . Loot received from the encounter depends on the order the Colossi are killed in , and killing Princess Yauj last is the intermediary route , yielding good loot but not the best . She has an AoE Fear , and heals herself as well . Upon death , she releases a swarm of Silithid s . Vem . Location : The Temple of Ahn ' Qiraj Raid 40 One of the three optional Silithid Colossi found in Ahn ' Qiraj , players must fight Vem at the same time as Lord Kri and Princess Yauj . Loot received from the encounter depends on the order the Colossi are killed in , and killing Vem last is the easiest method and yields the lowest quality loot . Vem can charge his opponents . Battleguard Sartura . Location : The Temple of Ahn ' Qiraj Raid 40 A Qiraji Battleguard in Ahn ' Qiraj , Sartura and her three guards are nasty opponents . All of them constantly reset aggro lists , the guards punt their opponents , and Sartura enrages at 20 % . And if she isn ' t dead within 10 minutes , she goes into a super - enrage that is sure to wipe the raid . Fankriss the Unyielding . Location : The Temple of Ahn ' Qiraj Raid 40 One of only two known silithid Sandreaver s , Fankriss summons many , " many " bugs during the encounter . He has an ability called Mortal Wound which cleaves through opponents and severely hinders healing . Viscidus . Location : The Temple of Ahn ' Qiraj Raid 40 A giant Slime , Viscidus is the second optional encounter in Ahn ' Qiraj , and is a highly Nature Resistance intensive fight . Not only that , but he is a very interesting fight as well . He normally takes only 50 % of normal damage . However , if he is hit by enough Frost attacks ( whatever the source ) , he will freeze . Once frozen , physical attackers move in and attack him until he shatters , exploding into 20 globs . Once these globs reunite , Viscidus appears again . Killing a glob deals 5 % damage to his total health , and is the most efficient way of killing him . Drops the bindings required for the AQ Set boots and shoulder pieces . Princess Huhuran . Location : The Temple of Ahn ' Qiraj Raid 40 A lone Silithid Wasp , Huhuran is a Nature Resistance intensive fight . Goes into frenzies that need to be dispelled by Hunter s . Has deadly Nature AoE that she uses when frenzied or enraged , spews Noxious Poison , and uses an AoE Wyvern Sting that not only put players to sleep , but deals thousands of Nature damage if dispelled . Enrages at 30 % . Drops the bindings required for the AQ Set boots and shoulder pieces . Emperor Vek ' lor . Location : The Temple of Ahn ' Qiraj Raid 40 Fought alongside his twin brother , Vek ' nilash , this Qiraji Emperor is immune to all physical damage , resulting in an interesting tanking situation . He spams Shadow Bolt and casts Blizzard . He reacts with an incredibly powerful attack that will wipe the raid if someone hits him with a physical attack . And for good measure , he constantly teleport - switches with his twin , who has a similar reaction to magical attacks . Drops a circlet required for the AQ Set head pieces . Emperor Vek ' nilash . Location : The Temple of Ahn ' Qiraj Raid 40 Fought alongside his twin brother , Vek ' lor , this Qiraji Emperor is immune to all magical damage . He has an Uppercut attack that knocks back opponents , and Unbalancing Strike , which deals massive damage and lowers Defense by 100 . He reacts with an incredibly powerful attack that will wipe the raid if someone hits him with a magical attack . And for good measure , he constantly teleport - switches with his twin , who has a similar reaction to physical attacks . Drops a circlet required for the AQ Set head pieces . Ouro . Location : The Temple of Ahn ' Qiraj Raid 40 The ancient Silithid Sand Worm , Ouro , is a being of legendary power . He is rumored to have been created by the Old God C ' Thun himself as a mockery of life . He is the last optional boss in Ahn ' Qiraj , and is Nature Resist intensive . During combat , he has a powerful breath attack called Sand Blast which deals large Nature damage , and an AoE knockback attack that often results in him targeting ranged attackers and healers . He also submerges at set intervals . When submerged , Dirt Mounds begin tearing around the room at random , dealing Nature damage to anyone caught their path . Once he reaches 20 % , he enrages AND starts summoning Dirt Mounds without submerging . Drops the items required for the AQ Set leg pieces . C ' Thun . Location : The Temple of Ahn ' Qiraj Raid 40 One of the Old Gods who ruled Azeroth prior to the coming of the Titans , C ' Thun has been plotting his revenge since the day he was defeated by a nameless Titan in the deserts of Silithus . It was he who created the Aqir , ancestors of the Qiraji and the Nerubian s , in the image of the Silithid . And it is he who drives the Qiraji on their relentless campaign . He is the final boss in Ahn ' Qiraj . During phase 1 of the fight , players must contend with his Eye , which shoots immensely powerful beams of energy , and an assortment of minor tentacles . In phase 2 , his body surfaces and giant tentacles appear , including mouth tentacles that swallow players whole . Those players plummet down into his stomach , full of disgestive acid , and must defeat some tentacles inside his stomach in order to weaken him . Drops the items required for the AQ Set chest pieces . Naxxramas . An ancient Nerubian ziggurat , Naxxramas was torn free from the ground by agents of the Lich King to serve as Kel ' Thuzad ' s base of operations as he spreads the plague throughout Lordaeron . Due to Kel ' Thuzad fighting a war against the Scarlet Crusade , the Argent Dawn , the Forsaken and the humans of the Alliance , as well as constant incursions of adventurers from every race and nation into the Scourge - controlled Plaguelands on a daily basis , his forces have been severely taxed to maintain the security of his necropolis . But now the gates of Naxxramas are open , Kel ' Thuzad ' s new forces are rapidly sweeping away all opposition to the Scourge . Anub ' Rekhan . A powerful Crypt Lord who guards the hallways of the Spider Wing in Naxxramas . Grand Widow Faerlina . As her name suggests , Faerlina is a powerful spider in the form of a female Human , clad in Warlock Tier 3 . She uses poison volleys , Rain of Fire and enrages , giving her abilities more destructive power . Maexxna . Maexxna is the final boss in the Spider Wing section of Naxxramas . She awaits all who dare oppose her in her giant web in the outer ring of Naxxramas . She uses powerful poisons and traps players into her webs . Noth the Plaguebringer . Once a notable Wizard and alchemist of Dalaran Noth heard the Lich king ' s call as Arthas and Kel ' Thuzad did , he was quick to turn his back on the light and joined the Scourge where he believed that real power lay . During the third war Noth saw that many innocent lives were needed to feed the growing might of the Scourge and he came to a point where he started opposing himself , Kel ' Thuzad resolved the matter by freezing his heart in his chest with his frost magic . Noth the Plaguebringer , now more undead than Human is an extremely powerful Necromancer with a various array of deadly spells and curses . Heigan the Unclean . A powerful undead sorcerer who resides in Naxxramas ' Plague Wing . Loatheb . The final boss in the Plague Wing . Loatheb uses an evil combination of incapacitating the healers by placing a one minute cooldown of every spell and placing a damage over time spell on all members of the group . Instructor Razuvious . Instructor Razuvious trains the warrior recruits of Naxxramas and poses an interesting fight . The Instructor himself deals insane amounts of damage ; to such extent that the only way to tank him is to Mind Control one of his 4 students and cycle through them as the Mind Controls run out . Above that , his fearsome shouts will drain and almost destroy anyone who hears them . . . Gothik the Harvester . As his name suggests , Gothik is the Harvester of Souls for the undead armies of the Lich King . The Four Horsemen . The Four Horsemen are four powerful death knights in the service of Kel ' Thuzad , in his dread citadel of Naxxramas . They are Highlord Mograine , Thane Korth ' azz , Lady Blaumeux , and Sir Zeliek . They appear to be based on the mythical Four Horsemen of the Apocalypse from the Book of Revelation , said to bring the end of the world - Zeliek as the White Rider of Conquest , Mograine as the Red Rider of War , Blaumeux as the Black Rider of Famine , and Korth ' azz as the Pale Rider of Death . Patchwerk . His name comes from " patchwork " ; as an Abomination , he ' s a disgusting amalgamation of flesh , bones , meat , metal , and threads . He is Kel ' Thuzad ' s avatar of war . Grobbulus . A poison and slime sprewing abomination that guards the halls of Naxxramas ' Abomination Wing . Gluth . An abomination patchwork that should resemble a kind of dog or a similar creature . Thaddius . Thaddius is a boss in Naxxramas . The theme of this boss is similar to that of Frankenstein ' s Monster , creating something akin to an Abomination in that it is sewn together of human parts , but also part machinery . While Thaddius is being powered up , his two " guardians " in the form of Wight s , Stalagg and Feugen , attack you . Sapphiron . An ancient servant of Malygos , - the Hand of Magic - Sapphiron was a blue dragon who lived with a powerful brood in Northrend by the Dragonblight , where he communed with the ancient spirits of the dead dragons . Sapphiron was magnificently powerful , and protected the lands of Icecrown as best he could . Though Ner ' zhul ' s malevolent influence defiled the Dragonblight , Sapphiron continued to guard his hoard of treasure from intruders . Anub ' arak , the King of Azjol - Nerub , thought that perhaps by equipping themselves with Sapphiron ' s treasures , he and Arthas might be more prepared for the perilous journey through Azjol - Nerub . Arthas agreed , and journeyed into Sapphiron ' s lair with Anub ' arak . Sapphiron greeted the undead as they approached him . He found Arthas ' s honesty about stealing his treasure quite refreshing . Sapphiron and his drakes attacked with all their might , unleashing their strange , cold magics upon them . In the end , despite all odds , Arthas was victorious , and Sapphiron was defeated . As a final , clinching victory , however , Arthas used what remained of his dwindling power to recreate Sapphiron as a frost wyrm to serve the Scourge . Kel ' Thuzad . Formerly a sorcerer of Dalaran , Kel ' Thuzad was one of the principal agents of the Lich King , responsible for the spreading of the Plague of undeath across Lordaeron . After being slain by Arthas during the events of the Third War , he was reborn as a lich . He then aided Arthas in summoning Archimonde , a powerful lord of the Burning Legion . However , Kel ' Thuzad ' s true loyalty was to the Lich King , and not the Burning Legion . After the Legion ' s defeat , Kel ' Thuzad supported Arthas in wresting power from the Dreadlords . When Arthas left for Northrend during the events of The Frozen Throne , he left Kel ' Thuzad as his agent to command the Scourge in Lordaeron . He now commands Scourge forces in the Plaguelands from his necropolis floating above Stratholme , Naxxramas .