Guide to Professor Putricide

Health:

• 10 Man: 9.7615M
• 10 Man Heroic: 13.67M
• 25 Man: 42M
• 25 Man Heroic: 50.2M

Abilities:

• Puddle of Slime - The Mutated Slime grows continuously, inflicting 4388 to 4612 damage every 1 sec until it is consumed by another Mutated creature!
• Mutated Transformation - You have been mutated! Inflicts 1950 to 2050 damage to nearby players every 1 sec. Curing the disease will revert the player to their form. This spell turns you into a Mutated Abomination.

Mutated Abomination:

• Mutated Transformation - Inflicts ~1,000 damage to all players every 2 seconds. Passive aura.
• Eat Ooze - Reduces the size of a nearby Slime Puddle. Increases the Abomination's energy by 4.
• Regurgitated Ooze - Inflicts 6,338 to 6,662 damage and reduces the target's movement speed by 50%. Costs 50 ooze energy.
• Mutated Slash - Inflicts 100% weapon damage and reduces the target's armor by 4%. Stacks up to 5 times and lasts 20 seconds.

Volatile Ooze:

• Ooze Eruption - Inflicts 39000 to 41000 damage sharesd with nearby targets, knocking them back in all directions!
• Volatile Ooze Adhesive - The Volatile Ooze Adhesive bonds the target to the Volatile Ooze, inflicting 2438 to 2562 damage every 1 sec and rooting the target. The Volatile Ooze will move towards the target, exploding for 39000 to 41000 damage, split among all nearby targets

Gas Cloud:

• Gaseous Bloat - Inflicts 1463 to 1537 damage every 2 sec and if the Gas Cloud hits you it will expunge all of the remaining Gaseous Bloat and harm all nearby allies. Stacks 10 times.
• Expunged Gas - The Gas Cloud's attack has expunged all of the gas from the target! Expunged Gas inflicts damage to all enemies based on the number of Gaseous Blight stacks that were remaining on the target when they were attacked

Phase 2:

• Choking Gas Bomb - Professor Putricide throws Gas Bombs around him, the Gas Bomb deals 5653 damage every 1 sec and explodes for 15600 to 16400 damage after 20 sec.
• Choking Gas - The Choking Gas inflicts 4388 to 4612 damage and causes you to choke, reducing your chance to hit by 75% for 10 sec.
• Choking Gas Explosion - The explosion inflicts 10725 to 11275 damage to enemies within 10 yards, knocking them back and reducing their chance to hit by 75% for 10 sec.
• Malleable Goo - Professor Putricide bounces a Malleable ball of Green Goo at the target, inflicting 9750 to 10250 damage and slowing attack and cast speed by 1% for 20 sec.

Phase 3:

• Mutated Plague - The Mutated Plague spreads to Professor Putricide, healing him for 300000 for each stack of Mutated Plague that was on the target.

The Fight:

Phase 1 (100-80%)

This is a 3 phase fight. It requires 3 tanks (2 in 10 man) but the other tanks are not needed until the last phase. Meanwhile, the rest of the fight is about killing adds and avoiding damage.
Puddle of Slime
Throughout the fight Putricide will throw out these slime puddles. Two at a time, green goo to not stand in. They also grow with time, eventually covering the room. There's a way to prevent this discussed below.
In the meantime, the raid just has to try to stay away from them. The tank will have to drag Putricide around. Our strat is to always try to keep Putricide on the green side, for the ooze, also explained later.
Mutated Abomination
The table of Putricide's offers potions for you to click on and drink. If you do (and one of you must), you're turned into an Abomination. You can be diseased cleansed of it (BUT DON'T), and the raid will receive a constant damage aura.
As an abomination, you get access to certain abilities. Eat Ooze, which is what you use to eat up those Puddles of Slime, and it also gives you energy to perform other abiltiies. Regurgitated Ooze, which is used to snare adds, and *almost* necessary to use. And finally, Mutated Slash, which is some nice dps you can do if the other priorities are taken care of (adds slowed, puddles under control).
The Abomination will last until Phase 3 which you'll be on your own for. You'll likely want one of your Off tanks to do this, since he's useless for the most part til Phase 3.
Shadowmourne: You guys with the Shadow's Edge doing that quest will have 1 other ability, and that's Unholy Infusion. Basically a channeled move that uses full energy, so you can't do the snares or dps during it. You would want to do this during a Green Ooze phase, those are less necessary to slow, providing you do the strat where everyone stacks on green side.
Unstable Experiment
Throughout Phases 1 and 2, Putricide will use this to summon adds. They are the Volatile Ooze and the Gas Cloud
Volatile Ooze
This will be the green ooze, and first add spawned and will alternate with the Gas Cloud. What this one does is targets a random player using a big green beam, which damages them so heal them, and moves towards the player. When it reaches him, it will explode, doing 40K damage split to all it hits.
So the best way to deal with that is to get as much people as possible to pile up on the green ooze and kill it asap. The Abomination will work to snare and help with the dps as well. Things like Feign Death and Vanish will cause the Ooze to pause and retarget so save those if you want when the ooze is close.
Gas Cloud
This is an orange ooze and what it does is, again targets a random raid member with an orange beam and damages them. This time, it also puts a 10 stack debuff on them, if the Cloud reaches the player, the stack explodes hitting the entire raid.
So very imperative to kite the thing around until the dps can kill it. Melee dps be sure not to jump in before it chooses its target, or you could risk being exploded in the face right there.

Phase 2 (75-35%):

Try not to push him over if you have a fresh Ooze/Cloud up, it could wind up as potential problems during the phase transition.
Tear Gas
This is a phase transition move. He will basically aoe stun the entire raid, and also give you near immunity to damage so you won't die during this if you're in a bad spot.
Meanwhile, Putricide just runs back to the table and starts chugging his pots.
This can be vanish and invis avoided, so your rogues and mages, with the right timing can avoid the stun and put extra dps on Putricide during this time. Or the Ooze/Cloud if you have those still up.
Phase 2 has all his previous abilities, plus 2 new ones.
Heroic: Instead of the Tear Gas, a brand new Ooze and Cloud spawns. Kill them ASAP.
Heroic 25 Man: Additional ability, featuring the Gas and Ooze Variable. Whatever variable you get, that's you can damage, so effectively splitting the raid up for you. Better hope you're not completely unbalanced in dps due to this.
Malleable Goo:
Putrcide starts chucking out bouncing green ooze at random raid members. If you remain where it lands, it will hurt you and slow your attack and casting speeds. Best to avoid them, run away when you get the warning.
Choking Gas Bombs:
The only other new ability of this phase. Throws out 2 orange beakers around him, if you get caught near them, they put a 15 sec -hit debuff on you. Then after some time, they explode. This pretty much forces you to move the boss around whenever they appear, and get out fast or you take a dps hit with that debuff.

Phase 3 (35-0%):

Tear Gas will start the phase transition again. Make sure to clear the Oozes/Cloud this time at least. It's more important cause there's a slight soft enrage now in this phase.
You also lose your Abomination, so the slime puddles start growing unchecked. Soft enrage mechanic, keep moving around to open spots.
Phase 3 has all his previous abilities, except the Oozes and Clouds stop spawning.
Mutated Plague:
The only new ability of this phase. He puts a stacking debuff on the tank in which, causes him to aoe damage the entire raid. And the power of it grows exponentially. And, should the tank ever die or expire while under that debuff, it'll heal Putricide for massive amounts, more with more stacks.
At around 4-5 stacks, the debuff becomes unhealable and the raid will die. In 25 man, you want 3 tanks trade tanking, while in 10 man, you can do this with 2. The goal is, to spread the stacks out among all the tanks, but never let a tank out long enough for the debuff to wear off (or he heals Putricide).
There are a few patterns to do this. Like taunting after every stack, so it goes 1-1-1, 1-1-2, 2-2-2, etc, etc. Or some can do 2-2-2, 2-2-3, 3-2-3, 3-3-3, etc. Proabably simplest to just go every 1, but whatever works so long as you remember to not let any 1 single tank take 5 stacks.
This gives you your second soft enrage of the phase. You have about 90 sec or so before the stacks should be too high to heal through.
That's about it, good luck!