So for those of you that don't know Warlocks have a quest chain that lets them change their fire spells to be green (Fel). To get it you have to farm a tome that drops of the rare elites on ToT Ilse. Once you get it you do a series of small quests mostly in outlands leading up to a solo scenario in the Black Temple.
The final part is a boss fight against a warlock called Kanrethad. This is probably the most difficult thing I have ever accomplished in game.
Kanrethad has 31 million health and has over 20 different abilities. Do complete this fight you must use your enslave demon ability, your gateway, your portal, 3 different pet abilities and deal with 3 different types of adds during the encounter. If you make a mistake at any point during the fight you will die and have to start again. You must also kill him within 7 mins or you die.
The fight basically goes like this:
Put your Gateway up, with the other end being behind a pillar out of LOS. Drop your teleport next to it.
Start the encounter, wait for the 30s of intro text then open up with all your CDs and go to town for another 30s of free dps.
Kanrethad then starts to summon a Pit Lord (i.e. Brutalis, Manaroth etc).
When it appears stun it with shadowfury, then enslave it so it becomes your pet.
Now that you have a new pet set it on to Kanrethad. Use your gateway to drop your threat so Kanrethad is now attacking the pit lord.
Now use your Pets charge ability to stun him and boost your dps for a few seconds. Don't use this again because you need it later.
Kanrethad now starts putting dots on you including one with a 7min timer called "Curse of Ultimate Doom" that will kill you when it expires. Effectively setting a time limit for the rest of the encounter.
Your pet has a breath weapon ability that can dispel these dots from you, you need to position your self on the opposite side of him so that you get hit by it when you use it to dispel the dots. He will also cast rain of fire that you need to move out of. If the dots stay on you they interrupt you, stun you, drop fire on the ground and all sorts of nasty things.
So at this point you are:
- Keeping full dps up on the boss to beat the enrage timer.
- Using your pets breath to remove dots on you.
- Ensuring your enslave demon is not about to end.
- Making sure you are not standing in the fire.
Kanrethad now starts casting Chaos Bolt, he will do this every min roughly for the fight, you've got 2 options.
1) Use your defensive cool downs to absorb the hit, then use your Pets heal ability to top you back up.
2) Use your gateway to get out of line of sight before the cast ends and he will cast it on the Pit Lord instead.
So now we are:
- Keeping full dps up on the boss to beat the enrage timer.
- Using your pets breath to remove dots on you.
- Making sure you are not standing in the fire
- Ensuring your enslave demon is not about to end.
- And using your gateway to get out of LOS for Chaos Bolt by using your gateway or def CDs.
Now Kanrethad runs to the middle of the room and starts casting Cataclysm. This has a 5s duration and if he completes the cast you take 1 million damage. You need to use your Pets charge ability to interrupt this.
So at this point you are:
- Keeping full dps up on the boss to beat the enrage timer.
- Using your pets breath to remove dots on you.
- Making sure you are not standing in the fire
- Ensuring your enslave demon is not about to end.
- And using your gateway to get out of LOS for Chaos Bolt by using your gateway or def CDs.
- Use your Pets charge ability to interrupt Cataclysm or you die.
Now Kanrethad starts summoning 60 wild imps, that all cast firebolt and will continue to do so until they die.
So you need to AOE them and use your pets breath weapon on them as well. If you time it right you can use your gateway to drop threat for a bit and have them attack the pit lord. You will get another Chaos Bolt while fighting them so you use your teleport to get back to your gateway and then get out of LOS.
So now we are:
- Keeping dots up on the boss to beat the enrage timer.
- Using your pets breath to remove dots on you.
- Ensuring your enslave demon is not about to end.
- Making sure you are not standing in the fire
- And using your gateway to get out of LOS for Chaos Bolt by using your gateway or def CDs.
- Use your Pets charge ability to interrupt Cataclysm or you die.
- Use your AOE abilities to get rid of the 60 imp adds asap.
You will get another Cataclysm now so use your Pets charge to interrupt it, dont forget to use the breath attack to clear your dots and keep up your dps rotation.
Now it starts to get really hard.
Kanrethad next summons 3 Felhounds, before they start to appear you need to order your pet to move to the other side of the room, preferably out of site behind a pillar. You need to do this because the Felhounds will dispel your enslave (and continue to do so while they are alive). If this happens the Pit Lord will charge you and you will die.
So at this point you are:
- Keeping dots up on the boss to beat the enrage timer.
- Making sure you are not standing in the fire.
- Ensuring your enslave demon is not about to end or has been remove by the FelHounds
- And using your gateway to get out of LOS for Chaos Bolt by using your gateway or def CDs.
- Use your offensive CDs to kill the 3 Felhounds as quickly as possible, keeping them out of LOS of your Pet.
Once they are dead you need to order your pet back on to the boss because you will get another Cataclysm now and need your Pets charge to interrupt it, don't forget to use the breath attack to clear your dots that built up while you were killing the Felhounds. At this point you will need to re-snalve the Pit Lord as its about to expire.
Next Kanrethad summons a Doomlord, when it appears you need to banish it or it starts chain casting shadow bolts at you. The Banish only lasts around 60s so you need to keep him banished for the rest of the fight.
So at this point you are:
- Keeping dots up on the boss to beat the enrage timer.
- Using your pets breath to remove dots on you.
- Ensuring your enslave demon is not about to end.
- Making sure you are not standing in the fire
- Making sure the Doom Lord is Banished
- And using your gateway to get out of LOS for Chaos Bolt by using your gateway or def CDs.
- Use your Pets charge ability to interrupt Cataclysm or you die.
Kanrethad will use Cataclysm again, so you interrupt it with charge and the whole cycle starts again. The enrage timer expires just after the 2nd doom lord appears. Which if you haven't killed him by then your in trouble with anyway as you can only banish one at a time.
It took me about 15 attempts to kill him in the end, with a break for dinner in between. A very frustrating but also very rewarding fight when you managed to do everything right!