Originally Posted by
TomatoBisque
Okay the third quest is probably most interesting (and the only one where anything other than a cutscene happens)
You go to the outdoor part of Blackrook Hold (where you quest, not into the dungeon itself) and get a scenario where you are controlling Illidan, helping Kur'talos and the Moon Guard defend it from the Legion during the WotA. You active a portal to summon more moon guard, and get an escort of 4 NPCs while you go try to clear out the demons and secure the area. You start with no abilities except for your autoattack (which also causes the moon guard with you to attack that target too), and new NPCs appear if they are all killed. During a "boss" encounter you get a cutscene once she reaches ~80% at which point Illidan realizes that fel magic > arcane magic, and you get an ability that lets you channel a heal that kills the 4NPCs (Illidan drains their life), and for each NPC killed this way you get a stacking 50% damage buff that lasts until the end of the scenario. You then get a Heroic Leap-type ability that does a ton of damage in a large aoe, then a disengage-type ability, then a channeled eyebeam type ability (except it lasts like 15s and you can move).
You finally reach a giant infernal enemy, which a fuckton of NPCs are fighting. Illidan realizes he has to drain the lives of all the moon guard fighting, which unlocks a final ability which one shots it. Lord Ravencrest, however, is pissed that Illidan killed all these people, and Illidan shoots back that if he hadn't, the Legion would turn the world to ash. He calls Ravencrest a fool and a coward, tells him next time to try begging for his life, then storms off. The naaru Xe'ra who is creating this flashbacks then says it was a difficult decision and understanding Illidan's perspective is important.
Then we get sent back, and there's a 4th quest that sends us to Azshara (the zone in Kalimdor) for another flashback