BossHellfire Assault
Image of Hellfire Assault
Gender Male, Female
Race Orc (Humanoid)
Level ?? Boss
Reaction Alliance Horde
Location Hellfire Citadel
Status Killable

Hellfire Assault is the first boss encounter in the Hellfire Citadel in Tanaan Jungle. The fight requires the raid to turn the Iron Horde's siege weaponry against the front gates to gain entry to the Citadel, while combating the Iron Horde that come forward to defend their stronghold.


Adventure Guide

With the aid of the mercenary Blackfuse company, the Iron Horde constructed devastating siege machinery in the shadow of Hellfire Citadel, to be used in the eventual assault upon Azeroth's capitals. With the tanks now retrofitted to use Fel energy, Siegemaster Mar'tak awaits Gul'dan's command to begin the assault.

Designer notes

Like Spoils of Pandaria in Siege of Orgrimmar, this is a raid “boss” without a single named boss that must be defeated. Players must withstand waves of attackers, salvaging ammunition from their fallen vehicles, and using that ammunition to power the massive Hellfire Cannons that stand in the courtyard. Victory is achieved by breaching the gates of the Citadel.


Players attempt to turn the massive Hellfire Cannons in the Citadel's courtyard against the mighty gate of the Citadel, while fending off Siegemaster Mar'tak and her militarized force. Throughout the encounter, waves of enemies rush at the players, periodically accompanied by huge siege weapons that seek to destroy the Cannons and the players defending them. Destroying these siege weapons allows players to salvage Felfire Munitions, which may be brought to the Hellfire Cannon, allowing it to continuously fire Hellfire Rounds at the Reinforced Hellfire Door. Once players successfully breach the Reinforced Hellfire Door, Siegemaster Mar'tak's forces retreat into the Citadel.

Dps icon.png Damage Dealers

  • Quickly defeat Gorebound Felcasters after they use Metamorphosis to become a Gorebound Terror.
  • Defeat Fel-Infused Siege Weapons to keep the Hellfire Cannons alive.

Healer icon.png Healers

  • Felfire Volley inflicts high raid-wide damage after Metamorphosis.

Tank icon.png Tanks

  • Be ready to grab the attention of any Hellfire Reinforcements.
  • Slam stacks increase Physical damage taken, so be wary when tanking multiple enemies and a Hulking Berserker.


  • Hellfire Cannon Important — Upon starting the encounter, players commandeer both Hellfire Cannons. Siegemaster Mar'tak's forces continually pour forth from Hellfire Citadel to prevent players from capitalizing on possession of these cannons. Based on available Felfire Munition reserves, the Hellfire Cannon will continuously fire at the Reinforced Hellfire Door. 
    • Felfire Munitions — Felfire-Imbued Siege Vehicles carry Felfire Munitions into battle. Upon death, the Felfire Munitions drop to the ground, allowing a player to pick it up. The Felfire Munitions despawn if not picked up within 10 min. Upon being picked up, a player gains Haste, increasing movement speed by 100% for 9 sec. While being carried, the Felfire Munitions inflicts 35000 Fire damage every second. 

Siegemaster Mar'tak

  • Ability arakkoa spinning blade.png  Howling Axe — Hurls a notched axe at a target, which strikes all marked targets before returning to the caster. Upon impact with each target, inflicts 166250 to 183750 Nature damage to enemies within 8 yards. 
  • Ability earthen pillar.png  Shockwave — Sends a shockwave in a targeted direction, inflicting 170625 Nature damage and knocking back enemies within 4 yards of each impact. 
  • Ability warrior battleshout.png  Inspiring Presence — Inspires nearby units, increasing damage done by 10%. This value increases while the caster fights enemies. 

Hellfire Reinforcements

  • Iron Dragoon — This hardened melee enemy wields a sharpened polearm and is at the beck and call of Siegemaster Mar'tak. 
  • Hulking Berserker
    • Inv misc volatileearth.png  Slam Tank Alert — Slams the target for 117000 to 123000 Physical damage and increases Physical damage taken by 30% for 12 sec. This effect stacks. 
    • Ability fomor boss shout.png  Cower! — Roars, causing nearby enemies to Cower for 9 sec., reducing their movement speed by 20% and inflicting 42750 to 47250 Physical damage, bypassing armor. 
  • Important Gorebound Felcaster
    • Spell fel incinerate.png  Incinerate Interruptible — Hurls a gout of flame at a target, inflicting Fire damage. 
    • Spell fire felflamebolt.png  Felfire Volley Interruptible — Conjures a volley of flame, inflicting 26125 to 28875 Fire damage to enemies within 50 yards. 
    • Spell shadow metamorphosis.png  Metamorphosis Important — Transforms into a demonic entity, inflicting 33250 to 36750 Fire damage and knocking back enemies within 5 yards and buffs the caster, increasing damage by 30% and movement speed by 70%. Immune to crowd control effects. 
      • Gorebound Terror
        • Spell fire felflamebolt.png  Felfire Volley — Conjures a volley of flame, inflicting 26125 to 28875 Fire damage to enemies within 50 yards. 
  • Contracted Engineer
    • Ability repair.png  Repair Important Interruptible — Repairs a targeted vehicle, healing it for 2% of total health every half-second. 
    • Spell shaman staticshock.png  Conducted Shock Pulse Interruptible Magic Effect — Shocks a target with a conductive shock pulse, inflicting 57000 to 63000 Nature damage and stunning the target for 6 sec. This damaging effect may jump up to 3 additional targets. 
    • Inv misc bomb 02.png  Boom — Sets an explosive charge at a target's feet, inflicting 95000 to 105000 Fire damage to targets within 5 yards after a short duration. 
  • Grand Corruptor U'rogg
    • Spell nature acid 01.png  Corruption Nova — Spews a stream of vile corruption, inflicting 71250 to 78750 Shadow damage to enemies within 2 yards of each impact location. 
    • Spell warlock demonbolt.png  Corruption Bolt — Hurls a ribbon of corruption at the target, inflicting 42750 to 47250 Shadow damage. 
    • Spell nature removecurse.png  Corruption Siphon — Corrupts the soul of a target, draining all but a sliver of their health, healing the caster for 3 times the drained value, and absorbing healing equal to the drained health for 15 sec. 
  • Grute
    • Ability vehicle launchplayer.png  Cannonball — Leaps at an enemy, inflicting 190000 to 210000 Physical damage to enemies within 9 yards of the targeted location. 
    • Ability earthen pillar.png  Shockwave — Sends a shockwave in a targeted direction, inflicting 170625 Nature damage and knocking back enemies within 4 yards of each impact. 
    • Ability fomor boss shout.png  Cower! — Roars, causing nearby enemies to Cower for 9 sec, reducing their movement speed by 30% and inflicting 61750 to 68250 Physical damage, bypassing armor. 
    • Inv misc volatileearth.png  Slam Tank Alert — Slams the target for 117000 to 123000 Physical damage and increases Physical damage taken by 30% for 12 sec. This effect stacks. 

Felfire-Imbued Siege Vehicles

  • Felfire Crusher
    • Spell nature lightningoverload.png  Bore — The Felfire Felcrusher inflicts 150000 Nature damage to frontal enemies every half-second. 
    • Spell fire flameshock.png  Burn — The Felfire Felcrusher brings several additional units to battle who channel flame in a frontal cone, inflicting 22500 Fire damage every half second for 4 sec. 
  • Felfire Flamebelcher
    • Spell fire felflamebolt.png  Belch Flame — Belches a volley of flame in the direction of the Hellfire Cannon, inflicting 142500 to 157500 Fire damage to enemies within 3 yards of each missiles' impact location. 
  • Felfire Artillery
    • Inv misc missilelarge red.png  Artillery Blast — Fires a superheated artillery shell at the Hellfire Cannons, inflicting 118750 to 131250 Fire damage to anything within 40 yards. 
  • Felfire Demolisher
    • Spell fire felfirenova.png  Siege Nova — Fires a series of mortars in a targeted direction, each inflicting 71250 to 78750 Fire damage to enemies within 3 yards of each impact. Additionally, a final mortar blast strikes enemies within 100 yards for 308750 to 341250 Fire damage, partially decreasing in damage as distance increases. 
  • Felfire Transporter
    • Ability vehicle launchplayer.png  Call to Arms! — The Felfire Transporter delivers a seemingly endless supply of units to the front lines. 


This fight consists of safeguarding the Hellfire Cannons from the enemy adds and vehicles until the cannons can destroy the gate, at which point the fel orcs retreat and the fight ends. The group should have two tanks, one for each side that the fel orc adds come down to. The group should also have one or two designated carriers of the Hellfire Munitions who can quickly bring them to the cannons, speeding up the destruction of the gate.

The fight begins by fighting Siegemaster Mar'tak, a sort of miniboss. The group can use [Bloodlust] here because Mar'tak must be forced to retreat as soon as possible due to her giving a stacking damage buff to all enemy adds. She uses a large Shockwave ability, which players need to dodge, and Howling Axe, which ranged players should spread out 8-yards for. At 50% she will retreat and adds will continue to be sent out at regular intervals until the fight ends. Among the adds, the Gorebound Felcasters are the most dangerous as, when they reach low health, they will turn into Gorebound Terrors and cast Felfire Volley very quickly and cannot be interrupted. DPS should try to focus Felcasters down individually since multiple Terrors being up at the same time can prove too much for the healers to heal through. Hulking Berserkers are next on the kill order, as they place a stacking debuff on the tanks that makes them take more damage. This damage is negligible at first, only really hurting the tanks when multiple berserkers are up at once. The Contracted Engineers use shock-pulse to stun random players. This should be interrupted by the DPS. Iron Dragoons can easily be AOE'd down and have no abilities.

The Felfire-Imbuded Siege Vehicles are at the top of the kill order as they cannot be tanked and most of them will head straight for the cannons, making them the biggest threat to success. Flameblechers shoot felfire in large areas and are difficult to dodge, but will usually target the players instead of the cannons. Its attacks are denoted by large green circles. Felfire Artilleries rush forward in front of the cannons and start firing on it, first spawning to the right, then switching to spawning on the left and back again as the fight continues. As they usually stand away from where the adds spawn, use DBM to know when they are going to spawn and move dps into position beforehand to ensure the least amount of damage as possible is taken by your cannons. Crushers are deadliest. They have a spinning drill on their front which will immediately kill players in its way and shoot fire in random directions. Melee DPS must stay to the side or behind it while dodging the flames and the drill. After each of these vehicles are destroyed, they will drop Felfire Munitions which must be taken to your cannons to increase their damage against the gate.

Overall, this is the simplest fight in Hellfire Citadel. If the group can kill the vehicles quickly enough and manage to have only one Gorebound Terror up at a time, they should have no problem beating this fight.


Raid Finder Normal/Heroic/Mythic
Item Type Item Type
 [Wicked Bonecarver's Knife] Agility dagger  [Blackfuse Company Utility Knife] (H · M) Agility dagger
 [Snub-Nosed Iron Rifle] Gun  [Felfire Munitions Launcher] (H · M) Gun
 [Iron Dragoon's Coif] Mail helmet  [Smoldercore Bulwark] (H · M) Shield
 [Fel Iron Roller Chain] Strength necklace  [Bolt-Latched Felsteel Gorget] (H · M) Strength necklace
 [Hand-Welded Gorget] Tank necklace  [Faulty Detonator Cord] (H · M) Agility necklace
 [Sooty Felcult Robes] Cloth chest  [Rangefinder's Spaulders] (H · M) Leather shoulders
 [Fel Mechanic's Sparkguard Bracers] Leather bracers  [Forward Observer's Camouflage Cloak] (H · M) Agility cloak
 [Manacles of Enforced Labor] Cloth bracers  [Sparkburnt Welder's Cloak] (H · M) Caster cloak
 [Ironspike Knuckled Gauntlets] Plate gloves  [Felgrease-Smudged Robes] (H · M) Cloth chest
 [Blackfuse Company Tool Belt] Leather belt  [Gorebound Wristguards] (H · M) Leather bracers
 [Siegesmith's Chain Leggings] Mail leggings  [Powder-Singed Bracers] (H · M) Cloth bracers
 [Engine-Kicking Boots] Plate boots  [Flamebelcher's Insulated Mitts] (H · M) Plate gloves
 [Pledge of Iron Loyalty] Spirit trinket  [Hand Loader Gauntlets] (H · M) Mail gloves
 [Blastproof Legguards] (H · M) Plate leggings
 [Iron Dragoon's Pantaloons] (H · M) Mail leggings
 [Shell-Resistant Stompers] (H · M) Plate boots
 [Mar'tak's Rugged Seal] (H · M) Tank ring
 [Sootstained Felsworn Signet] (H · M) Caster ring
 [Flickering Felspark] (H · M) Spirit trinket

Related Achievements


First trash pulled
Siegemaster Mar'tak yells: Stand, proud warriors. Our enemies march upon the foot of this mighty citadel... be on guard.
Siegemaster Mar'tak yells: You! Check on the citadel's defenses.
Hulking Berserker yells: Reporting for duty!
Siegemaster Mar'tak yells: Inspect our defenses, now!
Gorebound Felcaster yells: Ready to go!
Hulking Berserker yells: Attack!
Gorebound Felcaster yells: Move out!
Siegemaster Mar'tak yells: I see we have visitors. To arms!
Siegemaster Mar'tak yells: So, you wish to test the might of the Fel Horde? Come, warriors, show them how we treat unwanted guests.
Howling Axe
Siegemaster Mar'tak yells: Taste my axe!
Mar'tak flees
Siegemaster Mar'tak yells: I'll be back...
Hellfire Reinforcements
  • Siegemaster Mar'tak yells: Fire in the hole!
  • Siegemaster Mar'tak yells: Comin' in hot!
  • Siegemaster Mar'tak yells: Run them down!
  • Gorebound Felcaster yells: Charge!
  • Gorebound Felcaster yells: Attack!
  • Gorebound Felcaster yells: Ow!
  • Hulking Berserker yells: Charge!
  • Hulking Berserker yells: Ow!
Felfire Flamebelcher
  • Siegemaster Mar'tak yells: Burn them to the ground.
  • Siegemaster Mar'tak yells: Destruction!
Felfire Demolisher (heroic and mythic only)
  • Siegemaster Mar'tak yells: Strike them down!
  • Siegemaster Mar'tak yells: Destroy them!
Felfire Crusher
  • Siegemaster Mar'tak yells: Send in the crusher!
  • Siegemaster Mar'tak yells: Crusher, incoming!
Felfire Artillery
  • Siegemaster Mar'tak yells: Cannons on the way!
  • Siegemaster Mar'tak yells: They'll never see what hit them...
Felfire Transporter (mythic only)
Siegemaster Mar'tak yells: Blitz!
Killing a player
  • Siegemaster Mar'tak yells: Hah-ha! Trample their corpses!
  • Siegemaster Mar'tak yells: For Gul'dan!
Siegemaster Mar'tak yells: We are victorious!
Unused quotes
  • Gorebound Felcaster: Reporting for duty!
  • Hulking Berserker: Ready to go!
  • Siegemaster Mar'tak: Status report, soldier.
  • Siegemaster Mar'tak: How fares your work, warrior?
  • Siegemaster Mar'tak: What's our status, orc?
  • Siegemaster Mar'tak: Die!


Heroic Hellfire Assault - Mage

Patches and hotfixes

  • Warlords of Draenor Hotfix (2015-07-16):
    • Siegemaster Mar'tak should no longer repeatedly target the same players with her Howling Axe ability.
    • Fixed an issue that allowed players to exit the instance immediately after destroying the Reinforced Hellfire Gate and potentially fail to receive loot as a result.
  • Warlords of Draenor Hotfix (2015-07-07):
    • Adjusted scaling to reduce the amount of health by roughly 10% on some Hellfire Reinforcements and some Felfire-Imbued Siege Vehicles for a 10-player raid on Heroic difficulty. Health should remain the same as before for raids with 30 players.
      • Hellfire Reinforcements: Contracted Engineer, Gorebound Felcasters, Iron Dragoon, Hulking Berserker
      • Felfire-Imbued Siege Vehicles: Felfire Artillery, Felfire Crusher, Felfire Demolisher, Felfire Flamebelcher
  • Warlords of Draenor Hotfix (2015-06-25):
    • Contracted Engineer now has roughly 5% less health on Heroic difficulty.
    • Gorebound Felcaster now has roughly 5% less health on Heroic difficulty.
    • Hulking Berserker now has roughly 15% less health on Heroic difficulty.
    • Iron Dragoon now has roughly 5% less health on Heroic difficulty.
  • Warlords of Draenor Patch 6.2.0 (2015-06-23): Added.

External links