Sapphiron Sapphiron was an agent of the blue dragonflight who had guarded a treasure hoard in the mountains of Northrend . After being slain by Arthas Menethil , the dragon was raised as a powerful frost wyrm and sent to the halls of Naxxramas , where he guards the inner sanctum of the citadel ' s dread master , Kel ' Thuzad . Biography . " Once a noble blue dragon within the mountains of Northrend , Sapphiron was slain by Arthas during his campaign through the frozen north . Resurrected to serve him , Sapphiron guards Kel ' Thuzad ' s lair eternally , awaiting those who would dare trespass upon his master . " Said by Commander Eligor Dawnbringer An ancient servant of Malygos , 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 Northrend as best he could . Though Ner ' zhul ' s malevolent influence defiled the Dragonblight , Sapphiron and his brood continued to guard his hoard of treasure from any and all intruders . Sapphiron and his brood lived in relative peace until King Arthas , champion of the Lich King , was suddenly called back to Northrend to save his weakening master , Ner ' zhul . After three weeks at sea , the Death Knight landed on the shores of Northrend near Sapphiron ' s frozen lair , and was greeted almost immediately by the Crypt Lord Anub ' arak , King of Azjol - Nerub , another powerful servant of Ner ' zhul . Anub ' arak had sensed Sapphiron nearby and suggested to the young Death Knight that perhaps by equipping themselves with the ancient blue wyrm ' s treasures , he and Arthas might be better prepared for the perilous journey through the underground kingdom of Azjol - Nerub to Icecrown Glacier . Arthas agreed , and boldly journeyed into Sapphiron ' s lair with Anub ' arak . The two servants of the Lich King fought their way through Sapphiron ' s minions till they finally reached the great blue dragon himself . Sapphiron confronted the undead as they approached him . He found Arthas ' s honesty about killing him and stealing his treasure quite " refreshing " . Sapphiron and his fellow dragon s attacked with all their might , unleashing their strange , cold frost 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 necromatic power to recreate Sapphiron as a frost wyrm to serve the Scourge . Sapphiron , now a mighty frost wyrm , assisted Arthas in destroying the Naga and Blood Elf forces blocking the passage to Azjol - Nerub . Sapphiron was called upon again to destroy the dwarves guarding the gates to Azjol - Nerub , but the great dragon was left outside of the tunnels , where he guarded it against all who would disturb his new master . Some years later the Scourge attacked once again and Sapphiron was sent with Kel ' Thuzad to the Eastern Plaguelands to guard the Black Citadel Naxxramas . Sapphiron ' s powers are significantly greater than those of the average Frost Wyrm . This could be because Arthas , the Lich King ' s champion , revived him personally , or it could be a reflection of Sapphiron ' s greater power in life , or it could be some combination of both . Sapphiron has held onto his , throughout these events . The eye acts as a key to Malygos ' s home : The Eye of Eternity . World of Warcraft . The Burning Crusade . A reference is made to Sapphiron in the item , which can be purchased from in Shattrath City for . Wrath of the Lich King . Sapphiron appears in Wrath of the Lich King as the boss guarding the way into ' s chamber in Naxxramas . Statistics of Sapphiron from Warcraft III . However , stats from the World Editor are much weaker than in the campaign and original Frost Wyrms . Sapphiron ' s attacks become much greater than a Frost Wyrm once his attack and defense are upgraded from the graveyard . He also attacks much faster than a normal frost wyrm .