Kael ' thas ' forces Kael ' thas ' forces ( also referred as Kael ' thas ' army ) is the term referring to the armies under Kael ' thas Sunstrider after he departed from Azeroth and joined Illidan ' s forces . The army consists mostly of blood elves but also includes some fel orc s and demon s among the ranks . Although Kael ' thas is supposedly allied with Illidan Stormrage , in truth he has joined the Burning Legion ( the enemies of Illidan ) because of his hunger for magic . History . Formation of the army . Prince Kael ' thas led a group of his healthiest fighters to join the battlefront , where they hoped to fight the Scourge alongside Alliance forces in the aftermath of the Third War , but his commander , Garithos , was a racist man who put him in almost impossible missions , for one Kael ' thas had to get help from Illidan ' s Naga , however , this act was considered as treason and was sentenced to death . With no other choice he joined Illidan ' s forces and went to Outland to find his master . Alliance with Illidan ' s forces . Around 15 % of the blood elves followed him , there the combined forces of blood elves and naga defeated the Watcher s , lead by Maiev Shadowsong . After defeating the night elves , Illidan was reunited with his forces and prepared to defeat Magtheridon , the Lord of Outland . After many battles , Illidan ' s forces defeated Magtheridon but Kil ' jaeden appeared and ordered Illidan to destroy the Lich King . Kael ' thas was optimistic they would destroy the Frozen Throne . Kael ' thas ' forces became established across Northrend and were at war against the Scourge , when one day Arthas arrived and destroyed a settlement . After the battle , Kael ' thas and Arthas had a discussion . Kael ' thas was confident that the vast armies of Illidan would destroy the Scourge once and for all . Arthas , with the help of Anub ' arak , managed to emerge in Icecrown after taking a shortcut and confronted Illidan , Vashj , Kael ' thas and their armies . However , Arthas defeated Illidan in one - on - one combat and Kael ' thas was forced to leave . Kael ' thas felt that Illidan ' s agenda was short - sighted and made a new alliance with his previous enemy , the Burning Legion . Activities in Outland . Exodar . With Outland serving as the strategic battlefront in the ongoing Burning Crusade , the naaru recently used Tempest Keep to reach the shattered land . However , when the naaru set out from their stronghold , Kael ' thas and his blood elves quickly raided the dimensional fortress and assumed control over its satellite structures . Though Kael ' thas and his minions maintain a tight hold on the keep , a band of draenei , leaded by Velen , hijacked one of its satellite structures , the Exodar , and used it to escape Outland . However , the blood elves managed to sabotage the Exodar , and , while it managed to reach Azeroth , it crashed . Kirin ' Var Village . Kael ' thas wasn ' t part of the Kirin Tor anymore , and found out they held a village called Kirin ' Var Village in Netherstorm . One night he attacked the village . It began with the detonation of a mana bomb in the officer quarters at the northwest of the village . Thousands of blood elves attacked , even bringing Dimensional Ship s with them , and Archmage Vargoth cast a protective ward on the tower . Master Daellis Dawnstrike led the attack . Dawnstrike was a commander of the Sunfury blood elves and fought in the front lines , killing many Kirin Tor mages . During the attack , Spellreaver Marathelle looted the ; Summoner Kanthin claimed Glacius as his trophy ; and Naberius betrayed the Kirin Tor and handed the blood elves the secrets of the Violet Tower ' s defenses which Vargoth had cast . This led to the defeat of Kirin ' var village . Kael ' thas ' forces murdered all of the village inhabitants with the exception of Archmage Vargoth , who was imprisoned in the Violet Tower by Kael ' thas , and Ravandwyr , who fled with hoping to rescue his master later . Vargoth was sealed in with magic forbidding passage to anyone of the Kirin Tor . Kael ' thas took the from Vargoth and gave it to Spellbinder Maryana . Finally he left Ar ' kelos to guard Vargoth ' s prision . After the destruction of Kirin ' Var village , the blood elves withdrew to Sunfury Hold where some Sunfury were left stationed , including Spellreaver Marathelle . Mana surge s and arcane wraith s began to appear because the mana bomb had caused a rift in the nether . Scryers and the Azeroth blood elves ' betrayal . Kael ' thas sent out a regiment of blood elves , lead by Voren ' thal to destroy Shattrath City . When the draenei prepared to defend the naaru from the invaders , the blood elves dropped their weapons and pledged alligance to the Sha ' tar . That day Kael ' thas forces suffered more losses than ever before . Many of the best and brightest of Kael ' thas ' scholars and magisters were convinced by Voren ' thal to join the Sha ' tar . They called themselves the Scryers and became an enemy of Kael ' thas forces . When the Dark Portal was reopened , the blood elves who were left on Azeroth came to Outland . However , the elves learned Kael ' thas had lied to them and that there was no paradise through the portal ; he had merely been looking out for his own interests . Instead of helping Kael ' Tthas , the blood elves joined the heroes of Azeroth against him . Experiments . Kael ' thas was conducting several experiments across Outland . One of the experiments involved creating and dropping red crystals which attracted colossi and drove them mad . The experiment failed because of the intervention of the Cenarion Expedition , so Kael ' thas used an artifact created at the project at Firewing Point to destroy the Cenarion Thicket in vengeance - - the mana bomb . He used the Bonechewer clan as a distraction , but nevertheless , the project was destroyed by the Alliance and Horde and the Bonechewer clan was defeated . In Netherstorm , the manaforge s of the blood elves are threatening the region and may blow it up within a few months , probably taking much of Outland with the explosion . Defeat in Outland . The adventurers of Azeroth , guided by the Naaru , not only stopped the Kael ' thas ' forces in Netherstorm , but also launched a successful invasion of Tempest Keep , which nearly killed their leader Prince Kael ' thas Sunstrider . Azeroth and the final defeat . Though nearly destroyed in Outland , Kael ' thas and what remained of his forces not only launched an invasion of Silvermoon and captured the Naaru M ' uru , but were also able to begin summoning Kil ' jaeden into Azeroth . Despite this victory , the proud defenders of Azeroth , with the aid of the Shattered Sun Offensive , boldy challenged and defeated the last remnants of Kael ' thas ' s forces , finally killing the Sun King .