Cho'gall (tactics)

Cho'gall resides in the Throne of the Apocalypse in the Bastion of Twilight in the Twilight Highlands. He is the final boss on normal mode and the penultimate on heroic, with the final, optional boss being Lady Sinestra. He is surrounded by minions who must be dealt with before engaging the actual boss.

Under Cho'gall's control, the orcish Twilight's Hammer clan was transformed into a murderous cult obsessed with the Old Gods and their herald, Deathwing. Extended contact with his dark master has hideously warped both Cho'gall's mind and body.

Abilities
Many abilities in the encounter will cause Corrupted Blood.

Corruption causes and amounts:
 * Dark Sickness - 5
 * Accelerated Corruption - 2 per second
 * Sprayed Corruption - 5 per 2 seconds.
 * Spilled Blood of the Old God - +5 per second of standing in it.
 * Congealed Blood of the Old God melee - 2 per hit.
 * Corrupting Crash - 10
 * Depravity - 10
 * Festering Blood - 5
 * Debilitating Beam - 2 per second.
 * Corruption of the Old God - 1 per tick.

Phase One - 100% to 25%

Corrupting Adherents These are Faceless Ones with the following abilities:


 * If Corrupting Adherents are not killed in time they will gain

Phase Two - 25% to 0%

Phase One
Take Cho'gall to a corner and have the ranged group up in the centre. When Cho'gall casts conversion you will need to stun, interrupt, disorient or CC the players affected and this will be much easier in a tight group. The tanks will need to switch off for Fury of Cho'gall.

When a Corrupting Adherent spawns all DPS must switch to it. You must be careful to interrupt Depravity and move out of the way of Corrupting Crash. If you gain corruption in this phase phase two will be much harder. Make certain the Corrupting Adherent dies in a corner and that the tank and melee run out as it is dying to avoid corruption from spilled blood of the old god. The add must die before Cho'gall casts Fester Blood. If you kill it in time you will then need to snare and AoE down the Congealed Blood of the Old God. Avoid being melee'd by these as they cause corruption.

Repeat the process with the next Corrupting Adherent and make certain it dies very close to the first Adherent. This time you will have twice as much blood of the old god. The third adherent will have thrice as much blood of the old god, acting as a soft enrage.

If you are close to phasing and have an adherent spawn continue damaging Cho'gall. The adherent will despawn at 25%.

Phase Two
This phase is relatively simple, you will take more damage from the AoE pulse depending on how much Corruption you gained in the first phase. If you hit 100 Corruption you cannot be healed and will die. You will still need to swap tanks for Fury of Cho'gall.

Cho'gall will spawn Darkened Creations in this phase. It is very important to interrupt and stun these so that they do not cast Debilitating Beam, which causes corruption and effectively removes a player from the fight. The first two or three waves should be killed, after that burn Cho'gall.

Tip: Cho'gall tank should move the boss to a wall when nearing phase 2. This causes the Eyes that pop up to appear in a semi-circle as oppose to all around. This lets the DPS focus fire on each eye with interrupts and killing them.

Heroic Mode
Two Corrupting Adherents will come at a time, causing double the normal amount of blood.

Shadow Lords and Fire Elementals will appear on Flame and Shadow's orders that must be damaged to reduce Cho'gall's stacks of their buff.

Spiked Tentacles that melee quite hard and have too much HP to kill will appear in phase two in addition to darkened creations.

Quotes
A denotes Gall speaking, while regular text is Cho speaking. In addition to the quotes during his fight, he will say things at various points throughout the instance, such as when Halfus Wyrmbreaker dies.


 * Intro
 * yell


 * Aggro
 * yell


 * Conversion
 * yell
 * yell
 * yell
 * yell


 * Summon Corrupting Adherent
 * yell
 * yell
 * yell
 * yell
 * yell


 * Phase 2
 * yell


 * Darkened Creations
 * yell
 * yell
 * yell
 * yell
 * yell


 * Killing a player
 * emote
 * yell
 * yell
 * yell
 * yell
 * yell
 * yell
 * yell


 * Raid wipes
 * yell


 * Death
 * yell


 * Death on Heroic
 * yell

Loot
He drops Mantle of the Forlorn Conqueror, Mantle of the Forlorn Protector, and Mantle of the Forlorn Vanquisher for the Tier 11 shoulder pieces as well as specific loot.

Trivia

 * The "Stop. Hammertime!" quote is a reference to the popular song "U Can't Touch This" by MC Hammer.