The Iron Bulwark area of Hellfire Citadel has a substantial amount of trash. Once players clear the area of trash, Siegemaster Mar'tak will send a large wave of trash running along the ramparts towards the left-side Hellfire Cannon. After players defeat this wave, a similar wave will approach the right-side Hellfire Cannon.
Gorebound Terrors cast Fel Volley non-stop, dealing very high raid damage
Several of the mobs that players will encounter in the Hellfire Assault trash will reappear in the boss fight as Hellfire Reinforcements, and will be described in detail here. The most important of these enemies in the actual boss fight is the Gorebound Felcaster.
Gorebound Felcasters will cast
Felfire Volley occasionally
When Gorebound Felcasters reach 50% health, they will begin to cast
Metamorphosis, and will transform into Gorebound Terrors if this cast finishes
Gorebound Terrors will repeatedly cast
Felfire Volley until killed, dealing very high raid damage
Metamorphosis, and the Terror's casts of
Felfire Volley, cannot be interrupted
Hulking Berserkers are also dangerous, requiring tank-swaps or quick kills to prevent them from overpowering the tanks.
Berserkers will use
Slam on their current target approximately every 8 seconds, causing the tank to take additional Physical damage for 12 seconds
This effect stacks, resulting in extremely heavy tank damage
The optimal tank-swapping strategy is to swap at 2 stacks, but this results in very frequent swapping that may be impractical during trash fights
Berserkers also cast
Cower!, dealing armor-piercing Physical damage to players within 20 yards and applying a movement speed reduction
Ranged DPS and healers should stay more than 20 yards from the Berserkers to avoid this damage
Contracted Engineers are less significant, but their abilities require the raid to spread out somewhat and move infrequently.
Conducted Shock Pulse will target a random player and spread to up to 3 other nearby players
Affected players take moderate Nature damage and will be stunned for 6 seconds
The stun can be dispelled by healers
Engineers will also periodically leap to a random player and cast
Boom, summoning three bombs in a small cluster
After 10 seconds, these bombs will explode, dealing heavy damage to players within 5 yards
Players must watch for nearby armed bombs and move away
Iron Dragoons are simple trash mobs that deal melee damage.
Players will also encounter two Fel-Infused Siege Weapons in the Iron Bulwark.
Felfire Flamebelchers will aim
Belch Flame at a random player, launching a scattered volley of flames that deal moderate damage to players within 3 yards of the impact of each projectile
Felfire Demolishers target
Siege Nova at a random distant player, creating a large red targeting reticule
Shortly thereafter, the Demolisher fires mortars that land in a teardrop-shaped pattern, stretching from the Demolisher to the reticule
Players within 3 yards of these mortars will take moderate to heavy Fire damage
Several seconds later, the Demolisher then fires another, larger mortar at the center of the targeting reticule
This mortar will damage all players within 100 yards, but players can reduce the amount of damage they take by moving far away from the mortar's impact point
There are also two mini-bosses that players must defeat in this area: Grand Corruptor U'rogg and Grute. These mini-bosses are also part of the Mythic Hellfire Assault encounter.
Grand Corruptor U'rogg is a powerful caster enemy, with AoE damage and self-healing abilities.
Corruption Nova creates a pattern of small green ruptures on the ground, which erupt several seconds later to deal moderate damage to players within 2 yards
Corruption Bolt deals moderate Shadow damage to U'rogg's current target
Corruption Siphon targets a random player and deals a large amount of damage to them, leaving a debuff that will absorb healing equal to the damage dealt
Grute has the same abilities as the Hulking Berserkers.
In addition, there are four other adds that players will encounter in this trash:
Gorebound Fanatics will
Kaboom, haphazardly throwing explosives in the area around them
Gorebound Cauterizers will cast
Fel Shock on their current target, summon
Felfire Braziers that fling fire at the ground that deals damage to nearby players, and will heal other enemy mobs with
Gorebound Corruptors have the same
Corruption Bolt and
Corruption Siphon abilities that Grand Corruptor U'rogg has
Siegeworks Technicians throw
Felflame Crates at random players, dealing moderate fire damage to players within the impact zone
While fighting this trash, players should be careful not to pull too many enemies at once, particularly when Gorebound Felcasters are present. The kill priority should be as follows:
Once all the trash is cleared, Siegemaster Mar'tak and several accompanying adds will enter the Iron Bulwark. Players should stay back, near the Cannons, to avoid prematurely beginning the encounter.