Originally Posted by
Lore
Welcome to the Tankspot Dragon Soul raid guide. My name is Lore, and in this video we'll be walking you through Yor'sahj the Unsleeping. You'll need 2 tanks and 5 or 6 healers. Any DPS combination will do, but an even mix of melee and ranged is ideal.
Of all the fights in Dragon Soul, Yor'sahj is probably the most complicated. There's only one phase, but there's a lot that can happen. Let's get started.
Abilities
Yor'sahj himself has only one ability: Void Bolt. He'll cast this on the tank from time to time, dealing a large amount of damage and applying a damage over time effect. This can stack, and does significant damage the higher it gets, but can easily be dealt with by having tanks swap aggro every 3 stacks.
The real bulk of the fight comes from the various Bloods he can summon. About every minute, he will randomly summon three of six possible bloods, which are different colored oozes that spawn at the edges of the room. The oozes will slowly move toward Yor'sahj, and if they reach him, they will grant him an ability specific to that color ooze.
The purple, or Shadowed oozes, will cause Yor'sahj to cast Deep Corruption on the raid. While this is active, any player that is healed will gain a stacking debuff that lasts 20 seconds. If that debuff reaches 5 stacks, they explode on the entire raid for a large amount of shadow damage. That includes heals cast on the tank.
The green, or Acidic oozes, will cause him to cast Digestive Acid at random targets. This hits them for a substantial amount of Nature damage, and splashes to any other players within 4 yards.
The yellow, or Glowing oozes, will buff Yor'sahj with the Glowing Blood of Shu'ma. This soups up Yor'sahj's Void Bolt ability, letting him cast it twice as often and causing it to hit the entire raid. It also increases his attack speed by 50%.
The black, or Dark oozes, cause Yor'sahj to summon a bunch of Forgotten Ones. These are small adds that fixate on random raid members and hit them with an ability called Psychic Slice, which does a moderate amount of Shadow damage.
The red, or Crimson oozes, give Yor'sahj the ability to cast Searing Blood. He'll cast this on the 8 players farthest away from him, dealing damage that increases based on how far away from him they are.
Finally, the blue, or Cobalt oozes, will spawn a Mana Void. This will immediately drain all the mana from every mana user in the raid, although normal regen will still work after that. Once it's killed, it will redistribute all the mana that it drained out to everyone standing within 30 yards of it.
Strategy
Now, the oozes can be killed before they reach him, but as soon as one dies the others become immune to damage. That means you can only kill one ooze each wave. So, obviously, the real challenge of the fight comes down to choosing which ooze to kill and which ones to leave alive. Fortunately, there are some very simple rules to follow.
First, we need to decide which one to kill. This follows a simple priority system. The purple oozes -- the ones that cause players to explode if they're healed too many times -- are generally the most difficult to deal with. So, if there's a purple ooze, kill it.
Next in line are the Green oozes. Many of the other ooze's abilities can be easily dealt with by stacking up, but the Green ooze forces you to spread out. So, if there's no Purple ooze, kill the Green one.
If there's no purple or green ooze, look for a yellow one. That's the one that makes his Void Bolt hit the entire raid. The remaining oozes won't cause as much overall damage to the group, so kill yellow in that case.
Finally, if there's no purple, green, or yellow oozes, congratulations! You've gotten the easiest possible combination of oozes. Killing the Black one will keep you from having to waste DPS time AOE'ing down the Forgotten Ones and also lower the damage the raid is taking.
Now we just have to look at which oozes are left. First, check for the green ooze. If there isn't one, or you killed it, great! Stack up on the boss. Healers should prepare to heal the group, and DPS should prepare to kill a Mana Void or AOE down Forgotten Ones if either of them spawn.
If you DO have a green ooze left, things get more complicated. The raid will need to spread out 4 yards from each other and be ready to deal with whatever other ooze is left. Most of the time this just means that healing is extra annoying or you have to single target some adds.
However, if you were unlucky enough to get a combination of purple, green, and red, things get tricky. With green and red left, you'll have to stay 4 yards away from each other to avoid chaining Digestive Acid, but also need to stay as close to the boss as possible to reduce the damage taken from Searing Blood. This can be done, even on 25-man, but it requires some extremely careful positioning and is going to be really rough to heal though. If your raid team is having too much trouble with this, you may want to consider killing the Green one instead when you get that combination. You'll have to be very careful not to heal people too often, but then you can all stack up on him and minimize the Searing Blood damage.
Yor'sahj can be rather tricky, and yeah, there's a lot of randomness involved. But as long as everyone knows how to deal with the different oozes and follow instructions, with a little luck, you'll finally put Yor'sahj to bed.
If you'd like more information on this or any other Dragon Soul encounter, head over to Tankspot.com and click the Movies link at the top of the page. Thanks for watching, and good luck.
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