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BossOmnotron Defense System
Image of Omnotron Defense System
Race(s) IconSmall DwarfGolemDark iron golem (Mechanical)
Level ?? Boss
Reaction Alliance Horde
Location Stone Sentinel's Overlook, Blackwing Descent
Status Killable
Blackwing Descent

Omnotron Defense System
Nefarian's End



Omnotron Defense System

The Omnotron Defense System, also known as Tron Council and the Omnotron Council[1] is a council-type boss encounter in Blackwing Descent.

The bosses' starting positions are (from left to right if you are facing them from the entrance of the room) Magmatron, Arcanotron, Toxitron, and Electron.


Adventure Guide[]

The Omnotron Defense System was once touted as the Dark Iron dwarves' greatest technological marvel. When Nefarian arrived in Blackwing Descent, he repurposed the run-down system to annihilate anyone intruding on his laboratories.




  • Spell arcane arcane01 Power Generator — Summons a Power Generator under a random friendly target. This increases damage by 50% of all friendly and enemy targets within 5 yards. Also restores 250 mana (Heroic: 500) every .5 seconds. Lasts 1 minute. Instant cast
  • Ability mage arcanebarrage Arcane Annihilator Interruptible — Inflicts 48750 to 51250 (25: 58500 to 61500) Arcane damage to a random enemy target. Interruptible. Deals 102375 to 107625 damage on both Heroic formats. Interruptible. 1.5 sec cast
  • Spell arcane arcaneresilience Power Conversion Damage Dealer Alert — Power Conversion converts damage against the target to be converted into additional Magic damage and cast speed. Lasts 10 seconds. 1.5 sec cast
    • Spell arcane arcanepotency Converted Power Magic Effect — The Converted Power increases magic damage done by 10% and increases cast speed by 10% for 30 sec. Stacks. Dispellable/stealable.
  • Spell arcane arcane01 Overcharged Power Generator Heroic Difficulty — Nefarian converts a Power Generator to an Overcharged Power Generator. This increases damage by 100% of all friendly and enemy targets within 5 yards and restores 1000 mana every .5 seconds. However, it will start to grow in size until it explodes, causing Arcane Blowback.
    • Spell arcane arcanetorrent Arcane Blowback Heroic Difficulty Deadly — The Power Blowback caused by the Overcharged Power Generator inflicts 146250 to 153750 Arcane damage to enemies within 0 yards.


  • Spell shaman staticshock Lightning Conductor — Infects an enemy for 10 sec (Heroic: 15 sec), causing it to inflict 24375 to 25625 Nature damage to its nearby allies every 2 sec. Instant cast
  • Spell lightning lightningbolt01 Electrical Discharge — Inflicts 29250 to 30750 (Heroic: 53625 to 56375) Nature damage to up to 3 enemies within 8 yards. Damage is increased by 20% between each jump. Instant cast
  • Spell nature lightningshield Unstable Shield Damage Dealer Alert — Attacks against the Unstable Shield cause a Static Shock at a nearby enemy's location. Static Shock inflicts 58500 to 61500 Nature damage to enemies within 0 yards of the target. Lasts 10 seconds. 1.5 sec cast
  • Spell shadow shadowmend Shadow Infusion Heroic Difficulty — The Lightning Conductor is being fused with shadow by Nefarius, causing a Shadow Infusion. Shadow Infusion causes shadow damage to all nearby friends, inflicting damage based on the distance from the Shadow Infusion. Randomly cast on the target of Lightning Conductor, lasts 5 seconds. When removed, also removes Lightning Conductor and causes Shadow Conductor.
    • Ability warlock everlastingaffliction Shadow Conductor — Inflicts Shadow damage to all nearby players every 2 sec. Damage is increased the greater the distance away from the Shadow Conductor.


  • Spell fire incinerate Incineration Security Measure — The Defensive Measure inflicts 14625 to 15375 Fire damage every 1 sec for 4 sec. 1.5 sec cast
  • Ability hunter mastermarksman Acquiring Target — Acquiring a target. After 4 sec Magmatron will begin to channel his Flamethrower on the target, inflicting 34125 to 35875 Fire damage every 1 sec to all enemies in front of him for 4 sec. Can be canceled with aggro/combat-dropping abilities such as Feign Death, Vanish, Invisibility, etc. Instant cast
    • Ability mage firestarter Flamethrower — Inflicts 34125 to 35875 Fire damage every 1 sec for 4 sec. 4 sec channel
    • Spell shadow shadesofdarkness Encasing Shadows Heroic Difficulty — Nefarian holds the Aquired Target, preventing them from moving. Randomly cast on the Acquiring Target target.
  • Spell fire firearmor Barrier Damage Dealer Alert — Absorbs 150000 (25: 300000) damage and if the barrier is broken it releases a gale of flame, inflicting 73125 to 76875 Fire damage to all enemies. Lasts 10 seconds. 1.5 sec cast


  • Spell shadow plaguecloud Chemical Bomb — Fires a Chemical Bomb at a random target, causing a Chemical Cloud at the location. Instant cast
    • Spell shadow plaguecloud Chemical Cloud — The Chemical Cloud increases damage taken by anything (players and NPCs) in the cloud by 50% and on Heroic inflicts 14625 to 15375 Nature damage every 1 sec.
  • Ability creature poison 05 Poison Protocol — The Poison Protocol creates a Poison Bomb every 3 sec (25: every 1.5 sec) that will explode after coming in contact with its target or after being killed. Instant cast, 9 sec channel
    • Poison Bomb — Inflicts 146250 to 153750 (Heroic: 195000 to 205000) Nature damage to enemies within 0 yards. Cast when a Poison Bomb reaches its target.
    • Ability creature poison 05 Poison Puddle — Inflicts 11700 to 12300 Nature damage every 1 sec. Spawned at the point where a Poison Bomb explodes.
    • Ability creature poison 05 Fixate — The Poison Bomb is fixated on you! Poison Bombs are immune to taunt. Toxitron's current aggro target cannot be Fixated.
  • Spell nature nullifydisease Poison Soaked Shell Damage Dealer Alert — Applies Soaked in Poison on melee and spell attacks which inflicts 5000 Nature damage every 2 sec. Stacks. Lasts 10 seconds. 1.5 sec cast
    • Ability rogue deviouspoisons Soaked In Poison poison — Being Soaked In Poison inflicts 5000 Nature damage every 2 sec and causes spells and abilities to inflict 9750 to 10250 Nature damage to the target.
  • Spell shadow fingerofdeath Grip of Death Heroic Difficulty — Pulls all nearby enemies to Lord Victor Nefarius' location. When Chemical Bomb is cast, Nefarian will sometimes teleport to the middle of the Chemical Cloud and cast this.

Berserk: On heroic Difficult, the Bosses will enrage after 10 minutes of Combat.


10-man Normal[]

This is council encounter consisting of 4 golem bosses with a shared HP pool of 32M. There will only be two entities moving and using skills at a time. When a new golem is activated the old one will be granted a shield. This is there to encourage the dps to switch targets.

Players can stack them for extra damage from incidental AOEs, tank cleave, etc. The bosses do not do any cleaves, stacking buffs, or crazy AoEs that punish the tanks for this strategy. When the fight starts, only one golem is active. It has 100 stored energy, which starts draining as soon as you pull. Once the energy hits 50, another golem will "wake up" and join the fight. Once the first golem reaches 0, it shuts down, and a new one spawns. This continues in a cycle until you kill the boss.

A "stream" from the back wall to the next golem will show you which one is spawning next. Get ready to pick that one up once your golem reaches about 3 or 4 energy. You will know what golem to expect based on the color of the stream. Don't stand in poison clouds, and don't let the boss stand in whirlpools.
When you see "Acquiring Target" go off, Magmatron's target is about to take a lot of damage. A helpful red beam points to whoever is being targeted. The tanks are eligible targets as well. Get ready with preventive healing/shielding. If you are running low on mana, stand in a whirlpool for some nice regen.
Stand in the whirlpools for a buff. Don't stand in the poison clouds. Kill any slimes that spawn (they spawn 3 at a time (6 in 25-man) and you get a raid warning). If a slime is targeting you, kite it (especially if you are melee). They can be slowed so use whatever abilities are available to your raid. When a boss casts their "shield" ability (look for keywords Barrier, Shield, Shell, or Absorption) switch targets immediately, or bad things happen. Special note for melee: Your tank might get hit with the "Lightning Conductor" debuff. Watch out for this. If that happens, get away from the tank ASAP as they will be hitting you with a big aoe.
Spread out as much as you can. Don't stand in the bad stuff, but do stand in the good stuff. If you are targeted by Magmatron's "Acquiring Target" spell, stand there and take it (use damage reduction cooldowns if you have them; it will save the healer a lot of trouble).


Item Type
Inv chest raidshaman i 01 [Circuit Design Breastplate] (H) Healer mail chest
Inv bracer plate raiddeathknight i 01 [Electron Inductor Coils] (H) Agility mail chest
Inv belt plate raidwarrior i 01 [Jumbotron Power Belt] (H) Tank plate belt
Inv boots plate raidpaladin i 01 [Life Force Chargers] (H) Healer plate boots
Inv misc diamondring1 [Lightning Conductor Band] (H) Agility DPS ring
Inv knife 1h bwdraid d 02 [Organic Lifeform Inverter] (H) Agility dagger
Inv shoulder leather raiddruid i 01 [Passive Resistor Spaulders] (H) Healer leather shoulders
Inv shoulder leatherraidrogue i 01 [Poison Protocol Pauldrons] (H) Agility leather shoulders
Inv helm robe raidmage i 01 [Power Generator Hood] (H) Caster cloth helm
Inv misc rubystar [Security Measure Alpha] (H) Healer ring
Inv chest mail raidhunter i 01 [Voltage Source Chestguard] (H) Agility mail chest
Inv belt cloth raidpriest i 01 [X-Tron Duct Tape] (H) Healer cloth belt

Related Achievements[]


Lord Victor Nefarius yells: Hmm... the Omnotron Defense System. Centuries ago these constructs were considered the Dwarves' greatest tactical achievements. With so many counters to each construct's attacks, I'll have to rectify these designs for them to provide me any entertainment.
Activating units
  • Arcanotron unit activated.
  • Electron unit activated.
  • Magmatron unit activated.
  • Toxitron unit activated.
Activating unit shield systems
  • Arcanotron unit shield systems online.
  • Electron unit shield systems online.
  • Magmatron unit shield systems online.
  • Toxitron unit shield systems online.
Acquiring flamethrower target
Rerouting excess energy to Magmatron unit. Engage flamethrower device.
Encasing Shadows
Lord Victor Nefarius yells: You would like to move away from that, wouldn't you? Too bad.
Overcharged Power Generator
Lord Victor Nefarius yells: Stupid Dwarves and your fascination with runes! Why would you create something that would help your enemy?
Shadow Infusion/Shadow Conductor
Lord Victor Nefarius yells: Lightning Conductor works much better in a crowd, yes?
Grip of Death
Lord Victor Nefarius yells: Were you planing on using Toxitron's chemicals to damage the other constructs? Clever plan, let me ruin that for you.
System shuts down
Defense systems obliterated. Powering down...
Death on normal difficulty
Lord Victor Nefarius yells: That malfunctioning piece of junk was murder on the repair bills.
Death on heroic difficulty
Lord Victor Nefarius yells: I should've known better than to rely on something so stupidly named... to entertain me for long.
Unused quotes
Intruders detected! Primary defense matrix initiated![2]

Notes and trivia[]

  • World-first defeat of the encounter on Heroic 25-man difficulty achieved on 2010-17-12 by the guild Paragon of Lightning's Blade (EU).
  • Omnotron Defense System was originally intended to be called Omnitron Council.[3]



10-man Heroic[]

10-man Normal[]

25-man Normal[]

25-man Heroic[]

Patch changes[]

  • Cataclysm Patch 4.2.0 (2011-06-28):
    • Health, Melee damage, Electrical Discharge damage, Lightning Conductor damage, Health of Poison Bomb, Incineration Security Measure damage, and Arcane Annihilator damage have all been reduced by 20%.
    • Barrier absorb amount has been increased by 100%.
    • The cooldown on Power Conversion (Converted Power chance) has been increased.
    • Flamethrower damage has been reduced by 40%.
    • Static Shock caused by Unstable Shield damage and Poison Bomb damage has been decreased by 50%.
  • Cataclysm Hotfix (2011-04-27):
    • Summoning combat pets/guardians should no longer cause any issues with the Omnotron Defense System golems becoming activated.
    • Poison Bombs that Toxitron summons correctly prioritize ranged targets over melee targets first.
  • Cataclysm Hotfix (2011-03-16): The Omnotron Defense System encounter has had its health reduced by 15% on Heroic difficulty, and the damage of Incineration Security Measure has been reduced.
  • Cataclysm Patch 4.0.3a (2010-11-23): Added.


  1. ^ Patch 4.0.6
  2. ^ Cataclysm: Blackwing Descent (Boss Voices) (2010-08-17).
  3. ^ Jeremy Feasel on Twitter (2015-10-22).​ “They're seriously calling it Youtube Red. Did... did no one google search that? We Google searched Omnitron Council and changed it.”

External links[]