This fight is a kiting tank and spank with adds. Details below.
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Anub'Rekhan How To
For this fight you'll need both a main tank and an off-tank. Anub'Rekhan should be tanked along the outer edge of the room. The main tank should kite him around the outer edge of the room. Ranged DPS and Healers should try to be spread out in a semi circle and not bunched up.
During this fight Anub'Rekhan will attempt to impale raid members. This looks like spikes that will come out of the ground in a direct line from him. It will hit everyone in line between Anub'Rekhan and his target. It does 4813 to 6187 damage (Heroic: 5688 to 7312 damage), and it throws you into the air. You will take fall damage from this also. Ranged DPS and Healers should try not to group up because of this.
During this fight Anub'Rekhan will spawn Crypt Fiend adds one at a time. These should be picked up by the off tank, and dragged away from Anub'Rekhan. DPS should then burn this Crypt Fiend down quickly. They have a stacking poison dot that can be cleansed. This Crypt Fiend can be stunned which will prevent him from dotting you.
Once the Crypt Fiend is dead, you can turn your attention back to Anub'Rekhan. However as the fight progesses groups of Corpse Scarabs will spawn from the bodies of the Crypt Fiends. These should be taken out by AOE damage. The have realitvely low HP and don't do much damage individually, but as a group they can kill a raid member. So kill them as fast as possible. As you kill more Crypt Fiends, more groups of Corpse Scarabs will spawn. Also dead raid members will spawn Corpse Scarabs too. So raid members health should be topped off as often as possible. A death can compound the Corpse Scarabs and can eventually lead to a wipe.
The most important part of this fight is the Locust Swarm. Locust Swarm is a stacking dot that does 875 to 1125 (Heroic: 1313 to 1687) Nature damage every 2 sec. It will also silence casters. So it is important that the tank begin to run around the edge of the room during this phase. During this phase Anub'Rekhan will move at only 60% of his normal speed (Heroic: 75% movement speed), so he can be easily outrun during this. Once Locust Swarm is over the tank can again begin tanking.
Anub'Rekhan has a 10 minute enrage timer, but you should be able to kill him before then.
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