A Retadin in ICC Part 2 - The Plagueworks

So the first of the new wings to be open is based around the Death Knight unholy tree. Here you'll find some horrendous abominations, a mad professor and a couple of unusual pets.

Precious

While not a true boss this is a named mob which you'll have to fight before you can get to the real bosses. If you cleared Naxx in either of it's incarnations you'll recognise the concept of a big patchwork dog with a Devastate effect. You'll again get waves of zombies but you don't have to worry about them healing Precious, but you will want to nuke them down before wander off and eat a healer. Holy Wrath is useful here as you should be able to stun them in any AoE your raid is producing. Any Art of War procs after Devastate should probably heal yourself to help out, and to keep you alive.

Stinky

The other named mob with a Devastate. This time there's no waves of zombies but there is an AoE nature damage pulse which means you'll definitely want to heal yourself where possible but otherwise this is the easier of the two doggies to nuke down.

Festergut

A giant abomination which acts as a DPS check so bring your A game. The major mechanic that stops this being Patchwerk II is the blight that floods the room soon after the fight starts. Initially this will do massive raid damage so helping out the healers with a few instant Flash of Lights on yourself will almost certainly be a benefit. Periodically the boss will inhale some of the blight, buffing himself and reducing the damage you take. Once he's inhaled it all and beaten up the tanks a bit, he'll let it all out doing a stupid amount of damage. Now you could Divine Protection out if it, but that's only going to help you once in the fight, and he's going to do it twice before going berserk.

Fortunately before this happens he'll release spores on two raid members at a time, which give you a debuff when they expire, providing you're stood close enough, which in turn inoculates you against a portion of the damage. This happens 3 times before the exhale, and the inoculation stacks 3 times giving you a 75% damage reduction. If you get the spores you'll either need to run and hug the tanks (best option as you can keep hitting the boss) or run out to hug the ranged (bad as you'll have to hope for an instant exorcism to carry on doing damage). Don't try and hold out though, if you need to run, run as losing a ranged dps and healers halfway through will guarantee the wipe.

Some extra utility you can provide will be to help the tanks, over time they'll get a debuff which increases their damage, once one tank has nine stacks he'll hand over to the other while suddenly having the ability to do extra damage. A timely hand of salvation will hopefully stop them pulling threat back and causing a wipe.

Pop wings after the 3rd inhale each time, and hopefully the second time will in time to start weaving in Hammer of Wrath for some extra damage as you aim to beat the timer.

Rotface

The second abomination you're forced to fight doesn't do as much raid wide damage but has a much more involved mechanic you'll need to get used to.

Most of the time you'll be stood on the boss hitting him for all your worth, and shifting when he turns to do a spray attack. At an increasing rate he'll infect members of the raid which will do damage and reduce healing done to the infected person. When the infection expires a small ooze will spawn which will instantly aggro the infected person. A single small ooze will need to be dealt with by the person who spawned it, however subsequent ones will need to be merged with an ooze that is already up to form a big ooze, or to increase the size of it.

This means it's vital that subsequent cleanses happen to spawn the little ooze almost on top of the existing one so they merge almost instantly. This means you'll need to keep your mitts off of Decursive unless someone calls out for a dispel. The big ooze will be kited by one of the tanks so when you're infected run to just in front of it, hit cleanse and then get the hell out of dodge back to the big bad. Once 5 little oozes have been absorbed then the big ooze will explode, meaning you have to move away from where everyone was standing to avoid the fallout.

Finally when running around, certain corners of the room will fill with green slime which unsurprisingly you'll want to keep out of.

This is more a coordination fight rather than a dps race, so stay alive and do what you need to do keep the oozes away from the bulk of the raid.

Professor Putricide

If you thought the Rotface fight was involved then prepare for another step up in what you need to do. Your off-tank is likely to be running around as an abomination so don't worry about seeing one running around. To start you be attacking the Professor while staying out of the green slime he'll throw on the ground. The main tank will also be kiting him from one side of the room to the other so gain space away from the adds that spawn.

Yes, this is another target switching, add killing fight so be prepared to find what needs to be killed and make it dead.

The first type of add that spawns is a green slime from the north part of the room. Once it's spawned you'll want to stay away until it's fixated on a player and moves towards them. At this point start to burn it down, and stick close as when it reaches the target player it will explode for damage shared between everyone close by and knock them back. Try and get knocked back into space so if it then fixated on you there's time to get healed up before it explodes again.

The second type is an orange slime which spawns from the south side. Again it will pick a player and chase after them. This time you'll have to kite it while a stacking debuff drops off. If you're attacking it then you'll need to run away just before it switches target because if it reaches the target with the debuff it will cause raid wide damage.

Once the Professor hits 80% he'll stun the whole raid and run off to drink a potion. If you know this is just about to happen make sure you're a long way away from any adds that are up as they choose a new target as soon as the stun wears off and this could easily kill you or the whole raid.

All the stuff you've been facing for the first 20% is still present, and now you'll have orange stuff on the ground to stay out of as well. This new way of fighting will continue until you get him to 35% at which point he'll stun the raid again and go drink another potion. Personally I call haxx as I can only drink one potion in combat, but anyway..

At this point you're in a straight dps race, the abomination is no longer around to drink slime pools so you need to kill him before you run out of places to stand.

Once he's dead sit back and congratulate yourself on being 33% of the way to facing the Lich King.