Lady Deathwhisper - KILLED

Lady Deathwhisper is protected by her Mana Shield, which converts damage taken to mana lost. Phase 2 starts as soon as she has taken enough damage to bring her mana to zero. If Phase 1 takes longer than 7 minutes, there may not be enough time remaining to kill her in Phase 2 before she enrages.

During Phase 1 she cannot be tanked and spams Shadow Bolt, Death and Decay and Dominate Mind on random raid members (Dominate Mind is only cast in 25-player mode, it affects one raid member in normal mode, and mutltiple targets in hard mode). The mind controlled raid members need to be Crowd Controlled.

After 5 seconds of combat and every 60 seconds thereafter seven adds (three in 10 man, alternating left, then right) spawn. The three gates on the left side of the room always spawn two fanatics and one adherent, the right side gates one fanatic and two adherents. A seventh add of a random type spawns on the stairs. All types of adds can be CC'd.

Living adds can explode (dark martyrdom) at random times, which deals AoE damage and turns them into their reanimated versions. Reanimated Fanatics (melee) are immune to physical damage, Reanimated Adherents are immune to magical damage. Also at random, Lady Deathwhisper buffs living adds. Buffed Adherents become "Empowered Adherents", adding an uninterruptible AOE spell to their abilities, buffed Fanatics are "Deformed Fanatics" and double their melee damage output. These four special add types are the most dangerous, and must be killed as priority targets.

Adherents are caster mobs who spam deathchill bolt, put a cooldown increasing curse on random players, and sometimes shield themselves with a spell reflect shield. The shield (Shroud of the Occult) takes 50,000 damage to remove, or can be [Mass Dispelled]. While the shield is on them, typical silencing effects like [Shield Bash] do not work.

Fanatics have a high melee DPS output and a vicious cleave (melee DPS must take care to stand behind them). When buffed (as Deformed Fanatics), they double their damage output, and may also gain Vampiric Might, which is another 25% damage increase, plus a self heal for 3x the damage they cause. Deformed Fanatics should be kited, which is quite easy because their movement speed is halved.

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Phase Two

After her shield is down, Lady Deathwhisper switches to a new set of abilities, she gets an aggro table (in effect her threat is reset) and also starts to melee and cast Frostbolt volley. No more Adherents or Fanatics spawn, instead Vengeful Spirits randomly spawn near players.

Her Frostbolt spell should be interrupted. Dominate Mind and Death and Decay continue as before. She stacks an ability called Touch of Insignificance on her tank. This reduces threat generation by 20% per stack (stacks to 5). On normal difficulty, she can be taunted.

Vengeful Spirits pick a random target and follow it for 10 seconds, they explode for 25,000 shadowfrost AoE damage when they catch up. In normal difficulty it's possible to heal through this, in hard mode probably not. Players targeted by a Vengeful Spirit need to kite it until it goes away.

Eactly the same in HEROIC except she will mind control random players just like in 25man.

ALso there will be adds from the back of the room, so good idea to move her to the back of the room and tank her there.

So ghosts, adds and mind control (only for phase 1)