Illidan Stormrage "The Betrayer" is the final boss of the Black Temple. Before patch 2.4, he was the hardest boss in the game. The fight has five phases, good positioning is the key to success.
Abilities
* Berserk: After 25 minutes Illidan does a hard enrage.
Normal Form (Phases 1, 3 and 5)
* Melee: on plate ~8k main hand, ~3k off-hand, no crushing blows
* Shear: 1.5 sec cast, 7 sec debuff reducing max health by 60%, cast on Illidans current target. Cannot miss but can be dodged, parried or blocked
* Flame Crash: 1.5 sec cast, 10 yard AoE dealing 5k fire damage per tick for 2 minutes centered on the ground at Illidans current target
* Draw Soul: 1.5 sec cast, frontal cone AoE dealing 5k shadow damage and healing Illidan for 100k HP per target, resistible (shadow)
* Parasitic Shadowfiend: 30 sec cooldown, random target 10 second debuff, dealing 3k shadow damage per tick, spawning 2 Parasitic Shadowfiends on expiration
* Agonizing Flames: Phases 3 + 5 only, 5 yard AoE centered on the ground on a random player for 5k fire damage plus a Fire DoT debuff on all affected players for 36k damage over 60 seconds (increasing damage on each tick, final tick is ~4.6k fire damage)
* Soft enrage: Phase 5 only, after 40 seconds Illidan increases his attack speed by 30% and damage by 50%
Flying (Phase 2)
* Fireball: casting time 2 sec, Deal fire damage 3k-4k in 10 yards radius.
* Eye Beam: 30 second cooldown, putting a blue trail of Demon Fire on the ground. Players standing in this fire when it lands take ~20k Shadow damage. The Demon Fire trail lasts for 1 minute and deals 2k fire damage per second to players standing in it
* Dark Barrage: 40 sec cooldown, random target, 3k shadow damage per second for 10 seconds
Demon Form (Phase 4)
* Shadow Blast: 20 yard AoE for ~11k shadow damage centered on highest aggro target, cast every 2 sec, resistible.
* Flame Burst: 20 sec cooldown, 3.5k fire damage to all raid members plus extra splash damage to players closer than 5 yards to each other. Resistible.
* Shadow Demons: ~40 seconds into the phase, 4 Shadow Demons with ~22k HP spawn at Illidans position. They target random raid members and paralyze (stun) them, then move slowly towards their targets, kill them when they're there, then target somebody else.
* Aura of Dread: A 15 yard aura around Illidan for 1k shadow damage per second also increasing Shadow Damage taken by 30%. This effect stacks over time.
Parasitic Shadowfiends
* 6000 HP
* Target a raid member high on the global aggro list (usually a healer)
* Quickly move towards their target
* On dealing a successful melee attack, their target receives the Parasitic Shadowfiend debuff (spawning 2 more parasitic shadowfiends after taking damage for 10 seconds)
Flames of Azzinoth
* Health: ~ 1 million
* Melee: ~15k fire damage base, average of ~4k/hit with 365 resistance. Cannot crush or be blocked, but can crit, miss and be dodged or parried
* Flame Blast: Frontal cone 15 yard AoE for ~9k fire damage
* Blaze: AoE dealing 5k fire damage per second, centered on the ground at current target. Blaze always appears shortly after Flame Blast, and its location is decided at the instant the Flame Blast goes off.
* Charge/Enrage: If any raid member is farther away than 25 yards from *both* Blades, one of the Flames charges that player and enrages, wiping the raid