Gnomes are evil. Warlocks are evil. Warlock gnomes are evil². If I was a Blizzard developer and had to imagine an evil boss for Cataclysm, here is what I’d do:

Evil Gnome and his Eredar Twins minions (Ugly picture because Wow model viewer won't work... Sorry!)
At the beginning of the fight, the boss has 10% hp1 and will drain the life from all players in range. When all players are alive, the life he gains through his Drain Life aura will be more important than the life he loose through the damage done by the raid and thus the boss will gain life.
But as this gnome is evil², he love to kill people. Like: “Eh dude, you’re going to die in a few seconds, and there’s nothing you can do about it.” So at the beginning of the fight, he cast Curse of Doom on a random target. The target of the Curse of Doom will take 1 million damage after 1 minute. And the curse with jump on every target within 30 yards of the cursed target at the moment it does its damage. With reduced duration. And increased damage. And if the curse doesn’t jump, the gnome boss gain a 100% buff to his damage. (When I said gnomes were evil…)
Thus, after beginning the fight people are starting to die. After a few deaths, the raid start doing more damage than the life drained, and the health of the gnome start dropping. Yes. Warlock Gnomes are such evil than they’re eager to use an evil way2 to kill people, even at their own risk! But gnomes are intelligent. This gnome did the math, and he knows perfectly than after 5 minutes of fight, everybody in the raid will be dead.
But these 2 evil spells are not his only skills. He have toys too. Demon toys. And he is easily bored, so he summon a new very often. But Evil² Gnome doesn’t choose anybody as a minion. He choose the most powerful of all demons.Thus, every 20 seconds, the raid has to deal with a new demon between Lady Sacrolash, Grand Warlock Alythess, Mother Shahraz or Supremus, each one having a special ability to help his Master or destroy the raid.
You have to tank the Lady Sacrolash minions, but if there are too many of these alive your offtank will soon have his healing received reduced by 100%. Grand Warlock Alythess will cast Conflagration on random targets. Mother Shahraz will have an aura reducing one type of damage taken by the Evil Gnomes and all his minions. Supremus will need to be kited.
And, as the evil² Gnome is still bored, he smash random buttons : Unstable Drain Mana (a mix between Drain Mana and Unstable Corruption), Seed of Corruption and Corruption of Weakness being his favourite ones.
During the whole fight you’ll need to make choice : do you dispel the Unstable Drain Mana ? Do you kill the demons ? Perhaps you can handle the kiting of Supremus and the mortal strikes, but if there are a few Lady Sacrolash the mortal strike debuffs can become huge on your off tank. You also need to choose wisely the sacrificed players in order to keep an balanced raid during the full fight.
Here is the full description of the Evil² Gnome skills :
- Drain Life Aura : every one in range get their life drained at a rate of 10% life per second.
- Curse of Doom (non dispellable) : After 1 minute, the target take 1 million damage. The curse will jump to anyone in a 30 yards radius when it ends, with a duration reduce by 20%. If their isn’t anyone in range, or if the target die before the end of the doom, the doom get back to the boss, increasing his damage dealt (and life drained!) by 100%.
- Seed of Corruption (non displlable): Casted on the main target. Inflict shadow damage over time. After 30 seconds the seed explodes, dealing 100k damage in a 20 yards radius. The target of Seed of Corruption can’t be targeted by Curse of Doom.
- Corruption of Weakness : reduce the damage dealt and healing done by 50%, increase damage taken by 50% and reduce running speed by 50% (and life drained !)(magical debuff)
- Unstable Drain Mana : drain 10% mana every 2 seconds, last 10 seconds, inflict 50k damage to the dispeller ans silence the dispeller when dispelled.
- Invocation of doom : summon a random demon every 15 seconds.
- Lady Sacrolash : inflict heavy melee damage. Have a strike that reduce healing taken by 5%, stack up to 20 times
- Grand Warlock Alythess :Castes dire volt at random raid targets and cast Conflagration on a random target, confounding her and all targets within 5 yards
- Mother Shahraz : Prismatic aura: decrease damage of one type (including physical damage) and increase damage of another type on the evil gnome and all jus minions.
- Supremus : Attack a random target within very high melee damage. Supremus move himself very slowly and must be kited by his target.
And you, what evil boss would you imagine if you had to ? Take part in the Shared Topic for this week and design your own evil boss