BossSiegecrafter Helix Blackfuse
Image of Siegecrafter Helix Blackfuse
Title <Blackfuse Company>
Gender Male
Race Goblin (Humanoid)
Level ?? Boss
Reaction Alliance Horde
Affiliation(s) Blackfuse Company (True Horde)
Occupation Mercenary, Engineer of the True Horde, Leader of the Blackfuse Company
Location Siege of Orgrimmar
Status Killable (WoW), Deceased (lore)[1]
Companion(s) Shanna Sparkfizz (assistant), Blackfuse Bombling (pet)

Siegecrafter Helix Blackfuse is the twelfth boss of Siege of Orgrimmar. In addition to his custom shredder, Blackfuse will utilize the weapons that come from the conveyer belts on the sides of the room to produce bombs, lasers and other weapons to use against the players.

Helix Blackfuse's technology would later be used to help power the Iron Horde in World of Warcraft: Warlords of Draenor, with Pauli Rocketspark taking over the responsibilities of the construction.


Adventure Guide

Helix Blackfuse was the only goblin with the combination of engineering prowess, professionalism and ruthlessness to satisfy Garrosh in his search for the engineer of the True Horde. A mercenary at heart, Blackfuse's love for his creations (and the gold they fetch) has forever linked his fate with that of his patron and Warchief.

Encounter Design

Alongside the hardened infantry who are preparing for war in Garrosh’s underground barracks, Garrosh’s army would need mighty siege engines. The foundation for the concept of this fight lies in the U-shaped conveyor belt that encircles the chamber, allowing players to jump up into the workings of the assembly line and disrupt the manufacturing process. Observant players may recognize the components being assembled as the various parts of the Iron Juggernaut that they defeated earlier, with an extra heaping dose of bombs—because if you’re a goblin, there’s no such thing as too many bombs.[2]


The fight against Blackfuse unfolds amidst a weapons manufacturing assembly line. Each time the conveyor belts activate, three disassembled weapons of various types roll out, and players may access the assembly line by jumping into nearby pipes, to destroy one of the three. The remaining two will be activated and assault the raid until they slide out of view.

Dps icon.png Damage Dealers

  • Take turns going onto the Assembly Line to destroy one Disassembled Weapon per wave.
  • Automated Shredders' Reactive Armor makes normal attacks ineffective against them.
  • Destroy Crawler Mines before they can reach their targets.

Healer icon.png Healers

  • When an Electromagnet activates, Magnetic Crush deals sustained raidwide damage.
  • Automated Shredders deal increasing amounts of raidwide damage with Overload the longer they are alive.

Tank icon.png Tanks

  • Blackfuse heals any nearby Automated Shredders with his Automatic Repair Beam.
  • As you gain applications of Blackfuse's Electrostatic Charge, you can more effectively damage Automatic Shredders through their Reactive Armor.


Siegecrafter Blackfuse

  • Inv misc sawblade 01.png  Launch Sawblade — Siegecrafter Blackfuse launches a magnetized sawblade at a random player. The sawblade will hover in place until it is removed by an Activated Electromagnet.
    • Inv misc sawblade 01.png  Serrated Slash — Sawblades inflict 500,000 Physical damage to any players or Automated Shredders with which they come into contact, knocking back any affected players.
  • Spell shadow unholyfrenzy.png  Protective Frenzy Tank Alert Healer Alert — When one of his creations is destroyed, Siegecrafter Blackfuse enters a frenzy, increasing his attack speed by 100% and damage done by 50% for 10 sec.
  • Spell shaman staticshock.png  Electrostatic Charge Tank Alert — Siegecrafter Blackfuse charges his target with static electricity, inflicting 250,000 Nature damage. Electrostatic Charge also leaves a lingering effect increasing the damage taken from Electrostatic Charge by 100% increasing damage dealt to targets with Reactive Armor by 1,000%. This effect stacks up to 10 times.
  • Ability siege engineer automatic repair beam.png  Automatic Repair Beam Tank Alert — Siegecrafter Blackfuse's suit is fitted with an Automatic Repair Beam, which will detect any damaged Automated Shredders within 35 yards, and heal them for 5% of their maximum health every 3 sec.
  • Spell arcane arcane02.png  Overcharge Heroic Difficulty — When activated weapons arrive on the assembly line, Siegecrafter Blackfuse will Overcharge one of them, increasing its power and effectiveness.
  • Ability vehicle shellshieldgenerator.png  Energized Defensive Matrix — If three weapons make it through the Assembly Line and into Blackfuse's assembly machine, the machine will become overcharged and use the excess energy to power the defensive systems on Blackfuse's suit, granting him 90% reduced damage for 20 sec.
  • Automated Shredders — Siegecrafter Blackfuse will periodically call in Automated Shredders to join the fight.
    • Inv misc armorkit 27.png  Reactive Armor — Automated Shredders have been retrofitted with Reactive Armor, reducing damage taken by 90%. Automated Shredders can also be damaged by Serrated Slash, Shockwave Missile, Detonate! and Superheated.
    • Ability kilruk reave.png  Death from Above — The Automated Shredder propels itself into the air and then slams back into the ground, dealing 475,000 damage to players within 15 yards of the point of impact. After landing, the Shredder is stunned and takes 300% additional damage for 5 sec.
    • Ability siege engineer overload.png  Overload — The Automated Shredder will periodically cast Overload, dealing 200,000 damage to raid members not currently on the conveyor belt, and increasing its damage dealt by 10%.
  • The Assembly Line Important — Periodically, Siegecrafter Blackfuse will initiate fabrication of a set of weapons on the assembly line in his workshop. Disassembled weapons are brought in via conveyor belts along the northwest side of his room. They then pass through an assembly machine on the northeast wall of his room. Finally, they emerge completed on conveyor belts along the southeast wall of his room, where they attack players. Players can use Transport Pipes to reach the conveyor belt along the northwest side of his room, where they can attack and destroy the disassembled weapons. After players destroy a weapon, the remaining weapons become shielded and cannot be damaged.
    • Transport Pipes Damage Dealer Alert — Transport Pipes line the western edge of Siegecrafter Blackfuse's workshop. Players can jump into these pipes to reach the conveyor belt along the northwest side of the workshop.
      • Ability siege engineer pattern recognition.png  Pattern Recognition Damage Dealer Alert — After using the transport pipes to reach the conveyor belt, the assembly line recognizes a player's biological signature and will reject further attempts to use them for 60 sec.
      • Ability siege engineer purification beam.png  Matter Purification Beam Damage Dealer Alert Deadly — Matter Purification Beams line the platform, inflicting 9,999,999 Fire damage to any players that come into contact with them.

Shockwave Missile Turret

  • Ability siege engineer sockwave missile.png  Shockwave Missile — The Shockwave Missile turret launches a drill-tipped Shockwave Missile into the ground, sending a barrage of drills that ripple out from the impact location and create rings of seismic energy. Each ring of seismic energy inflicts 385,000 Nature damage to all players caught within it.
  • Overcharged Missile Turret Heroic Difficulty — When Overcharged, the Shockwave Missile Turret will fire Shockwave Missiles which persist and continuously barrage the platform with drills and seismic energy until destroyed by players.

Laser Turret

When activated, Siegecrafter Blackfuse's Laser Turrets fire a beam of energy that tracks a player, leaving behind patches of superheated ground for 60 sec.

  • Ability siege engineer superheated.png  Superheated — The ground hit by a Laser Turret's beam burns any players or Automated Shredders who step on it, inflicting 75,000 Fire damage each second for 10 sec. This effect stacks every second that a player or Automated Shredded remains on superheated ground, and can stack up to 50 times.
  • Overcharged Laser Turret Heroic Difficulty — When Overcharged, Siegecrafter Blackfuse's laser turrets will fire a split beam, creating three concentric arcs of Superheated ground.


  • Ability siege engineer magnetic crush.png  Magnetic Crush — When activated, the electromagnet will begin to magnetically crush all players on the platform, inflicting 75,000 Physical damage each second and pulling them towards the electromagnet. The force of the electromagnet will also pull all sawblades on the platform towards it and off the platform, causing them to damage any enemies or Automated Shredders in the path of the blades.
  • Overcharged Electromagnet Heroic Difficulty — When Overcharged, the Electromagnet will periodically reverse polarities, pushing both players and sawblades in and out from the magnet.

Crawler Mine

Assembled Crawler Mines leap down from the conveyor belt, fixating on a random player.

  • Ability siege engineer detonate.png  Detonate! Deadly — When a Crawler Mine reaches its target, or after a Major Malfunction, it will self-destruct, inflicting 275,000 Fire damage to players within 300 yards and knocking them into the air.
  • Petbattle speed-down.png  Break-in Period — Crawler mines are vulnerable to roots, snares and stuns for 60 sec after joining the battle.
  • Petbattle speed.png  Ready to Go! — After their Break-in Period expires, Crawler Mines lose their vulnerability to stuns, roots and snares, and their speed increases.
  • Overcharged Crawler Mines Heroic Difficulty — When Overcharged, Crawler Mines activate a construction matrix within their machinery. This construction matrix enables them to create two new Crawler Mines when they are destroyed.


Siegecrafter Blackfuse
Item Type Description
 [Shoulders of the Cursed Conqueror] (LFR · H · M) Shoulders T16 token
 [Shoulders of the Cursed Protector] (LFR · H · M) Shoulders T16 token
 [Shoulders of the Cursed Vanquisher] (LFR · H · M) Shoulders T16 token
 [Asgorathian Blood Seal] (LFR · H · M) Finger Strength DPS
 [Blackfuse's Blasting Cord] (LFR · H · M) Neck Strength tank
 [Bomber's Blackened Wristwatch] (LFR · H · M) Leather wrist Agility DPS
 [Bracers of Infinite Pipes] (LFR · H · M) Mail wrist Agility DPS
 [Calixian Bladebreakers] (LFR · H · M) Plate hands Strength tank
 [Dysmorphic Samophlange of Discontinuity] (LFR · H · M) Trinket Healer
 [Fusespark Gloves] (LFR · H · M) Cloth hands Intellect DPS
 [Lever of the Megantholithic Apparatus] (LFR · H · M) Staff Intellect DPS
 [Powder-Stained Totemic Treads] (LFR · H · M) Mail feet Intellect DPS
 [Siegecrafter's Forge Hammer] (LFR · H · M) Mace (1H) Strength DPS
 [Ticking Ebon Detonator] (LFR · H · M) Trinket Agility DPS

He also drops  [Blackfuse's Power Core] for hunters.

Related Achievements



Horde Grizzle Gearslip and a contingency of goblin troops teleport into the Siegeworks.

Grizzle Gearslip says: So Garrosh thinks he can cheat ol' Grizzle out of a payday, huh?!

Grizzle, his troops and the raid notice Siegecrafter Blackfuse adding the finishing touches to an immense, spherical weapon.

Grizzle Gearslip says: Oh, ho ho... What do we have here?

Alliance Moira Thaurissan and a contingency of dwarven troops drill into the Siegeworks.

Moira Thaurissan says: Oi! That was a fun ride!
Moira Thaurissan says: Heroes, I salute you. There's something right foul in these chambers below the city.
Siegecrafter Blackfuse says: Oh, look. You're the ones who smashed up my Juggernaut.
Siegecrafter Blackfuse says: Let's see how you like the newest addition to the Warchief's arsenal... the Iron Star!
HordeGrizzle Gearslip says: Go get it boys, that contraption's got nothin' on real goblin engineering!
AllianceMoira Thaurissan says: Ooh, that looks dangerous. Get in there, boys, and show em' what we're made of.

Grizzle's/Moira's troops charge the Iron Star. The Star rolls forward, spewing flames in its path before exploding. Grizzle's/Moira's troops are slain instantly.

Siegecrafter Blackfuse says: Hehehehahahaha!
HordeGrizzle Gearslip says: Ahhhh! Or maybe it does. I better, um, go check on the others.
AllianceMoira Thaurissan says: A right deadly machine, that is. Best watch yer step down here, heroes.

Blackfuse flees through the pipes into his workshop, where he climbs into his Shredder.

Siegecrafter Blackfuse says: Aggron! Show 'em who's boss!
Goro'dan! You're on deck!
All right, Shanna. You're up.
Looks like I'm in the market for a new assistant.
  • Let's settle this.
  • Time to mix business with pleasure.
Unfinished weapons begin to roll out on the assembly line.
Launch Sawblade
Siegecrafter Blackfuse faces you and readies Launch Sawblade!
Automated Shredder
An Automated Shredder draws near!
The SD-5 Automated Shredder defense unit. A labor of love.
Shockwave Missile Turret
Presenting... the beautiful new ST-03 Shockwave missile turret!
Laser Turret
An Activated Laser turret has locked on to you!
Meet the LT-403 Evaporation laser. A personal point of pride.
Ya' ever wonder how magnets work?
Crawler Mine
Hey, I heard you like mines, so... enjoy!
Overcharged Crawler Mines
What's better than a bomb, huh?! I'll tell ya - a bomb with two bombs inside!
Weapon destroyed
  • Hey! You're gonna pay for that!
  • You son of a...
Killing a player
  • Another satisfied customer.
  • That's for the Juggernaut.
An explosion in the shredder ejects Blackfuse, launching him into the air and into the middle of the room, where he burns momentarily while kneeling.
The sound of grinding metal reverberates through the halls as the lock on the Nexus doors releases.
Don't... think you've won...
My legacy... will live on...
Blackfuse collapses and dies.
Unused quotes
  • All right boys. Lets show them how Blackfuse Company fights.
  • Start the assembly line!
  • Another round!
  • More, MORE!!
  • Nobody beats Blackfuse! NOBODY!
  • Never interrupt an artist!


  • Blackfuse is the first goblin raid boss.
  • His claim that his 'legacy will live on' is very likely a direct foreshadowing of Warlords of Draenor.
  • Looking into the cockpit of Blackfuse's special shredder reveals an image of Garrosh Hellscream on the screen, much like the Kerrigan easter eggs in the standard Shredder and the  [Sky Golem].
  • He looks festive during the Feast of Winter Veil event.
  • Blackfuse is voiced by Ernie Sabella.


Siegecrafter Blackfuse

Siegecrafter Blackfuse 25 Heroic - Mage, Game Sounds, Boss voices, Vent, Post-Hotfix

Patch changes

  • Mists of Pandaria Hotfix (2014-01-21):
    • Automated Shredders' health has been reduced by 10%, and its Overload ability now deals 10% less damage on Heroic difficulty.
    • Crawler Mines now have 20% less health on 10-player Heroic difficulty.
    • Disassembled Crawler Mines, Deactivated Electromagnets, Deactivated Laser Turrets, and Deactivated Missle Turrets now have 20% less health on Heroic difficulty.
    • Electromagnet's Magnetic Crush ability now deals 15% less damage on Heroic difficulty.
    • Laser Turret's Superheated damage-over-time effect now deals 25% less damage on Heroic difficulty.
  • Mists of Pandaria Hotfix (2013-11-25):
    • Siegecrafter Blackfuse's Magnetic Lasso will now also pull character corpses that are on the conveyor belt to the main platform.
    • Resolved an issue during the Siegecrafter Blackfuse encounter where players dropping into the conveyor belt may sometimes take fatal fall damage.
    • Resolved an issue where destroying the last disassembled weapon right as it exits the conveyor belt may cause Siegecrafter Blackfuse to incorrectly gain the Energized Defensive Matrix effect.
  • Mists of Pandaria Hotfix (2013-11-04):
    • Siegecrafter Blackfuse now deals less damage on Raid Finder difficulty.
    • Crawler Mine's Detonate! ability now deals less damage on Raid Finder difficulty.
    • Disassembled weapons now have less health on Raid Finder difficulty.
    • Siegecrafter Blackfuse's Electrostatic Charge is now also applied to player controlled pets.
    • Resolved an issue where Blackfuse Sellsword's Envenomed Shadowstep was causing more damage than intended.
  • Mists of Pandaria Hotfix (2013-10-31): Resolved an issue where the deactivated weapons on the conveyor belt had more health than intended on Normal and Heroic difficulties.
  • Mists of Pandaria Hotfix (2013-10-03): Demonic Circles are now cleared when the encounter starts.
  • Mists of Pandaria Hotfix (2013-10-02):
    • Players are now immune to Superheated while being pulled off the conveyer belt.
    • Shockwave Missile no longer hits players that are exiting a transport pipe.
  • Mists of Pandaria Hotfix (2013-09-23): Automatic Repair Beam should now always be properly applied to Automated Shredders when they get near Siegecrafter Blackfuse.
  • Mists of Pandaria Hotfix (2013-09-19): Siegecrafter Blackfuse will no longer Overcharge more than one cluster of Crawler Mines per wave on Heroic difficulty.
  • Mists of Pandaria Hotfix (2013-09-12): Players standing on the conveyor belt should now be able to see Shockwave Missile and its damage effect regardless of the Shockwave Missile's position in the room.
  • Mists of Pandaria Patch 5.4.0 (2013-09-10): Added.

See also


External links

Preceded by:
Head of the Blackfuse Company
Succeeded by:
Pauli Rocketspark