Omnotron Defense System

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Blackrock Mountain logo.png The subject of this article is part of the
Blackrock Mountain adventure.

Omnotron Defense System

Omnotron Defense System.png

Set: Blackrock Mountain
Type: Hero
Health: 30 (Normal)
30 (Heroic)
Armor: 15 Armor.png (Heroic)
Artist: Alex Horley

Nefarian has escaped! Follow him after you disable his laboratory's defense system!

For the Tavern Brawl minion, see Omnotron Defense System (Tavern Brawl)

Omnotron Defense System is a boss encounter found in the Blackrock Mountain adventure. It is the first encounter of the adventure's fifth wing, Hidden Laboratory.

Hero Powers[edit | edit source]

Normal Heroic
Activate Arcanotron(14591).png
Activate Arcanotron(14592).png
Activate Toxitron(14594).png
Activate Toxitron(14595).png
Activate Electron(14598).png
Activate Electron(14599).png
Activate Magmatron(14602).png
Activate Magmatron(14603).png
  • All of the above Hero Powers except Activate! are auto-cast, and will be used at the beginning of each turn if possible. However, the varying mana cost means this will not always be possible, in which case the Hero Power will not be used (and thus will not be replaced), and the mana may be spent otherwise.

Special cards[edit | edit source]

Normal and Heroic

Deck[edit | edit source]

The below classes are listed purely for reference, and have no effect on the boss' use of the cards during the battle.

Normal and Heroic
Class Card Quantity
Boss Recharge 2
Magmaw 1
Mage Arcane Missiles 1
Flamecannon 2
Rogue Iron Sensei 2
Shaman Earth Shock 2
Neutral Clockwork Gnome 2
Cogmaster 2
Mechwarper 2
Micro Machine 2
Arcane Golem 2
Tinkertown Technician 2
Arcane Nullifier X-21 2
Dragonling Mechanic 2
Enhance-o Mechano 2
Antique Healbot 2

Strategy[edit | edit source]

The central mechanic for the Omnotron Defense System encounter is the boss' shifting hero powers, and the various Trons that are generated by them. The boss starts with Activate Arcanotron (Heroic), but once this is used it will be replaced by Activate Toxitron (Heroic), followed by Activate Electron (Heroic) and Activate Magmatron (Heroic), with the switching presumed to end with Activate! (Heroic). All hero powers except Activate! are auto-cast, but due to their mana cost may not be usable during earlier turns. Until Activate! is acquired, the boss will use their current hero power at the very start of the turn, whenever possible.

Heroic[edit | edit source]

Please add any available information to this section.
Guides and decklists

Videos[edit | edit source]

Rewards[edit | edit source]

Volcanic Drake(14450).png

Dialogue[edit | edit source]

Before match

My inner sanctum is guarded by the most powerful defense system imaginable!


Omnotron Defense System
Intruders detected.

Turn 1

Omnotron Defense System
Primary defense matrix: initiate.

Emote Response

Omnotron Defense System
Beep. Boop. Beep. (for first emote)
Attempting to connect. (for second emote)
Connection successful. Downloading OS updates. (for third emote)
Update installed. Hello! Hello! Hello! (for fourth emote)
Hello! Hello! Hello! (for fifth emote and further)

Hero Power

Omnotron Defense System
Electron unit activated. (Activate Electron)
Toxitron unit activated. (Activate Toxitron)
Arcanotron unit activated. (Activate Arcanotron)
Magmatron unit activated. (Activate Magmatron)
Defense unit online. (Activate!)


Omnotron Defense System
Re-routing excess energy.


Omnotron Defense System
Defense systems obliterated. Powering down.
You've saved me some hefty repair costs. Thanks.

Lore[edit | edit source]

Blackrock Mountain[edit | edit source]

The Omnotron Defense System was once a plaything of the Dark Iron dwarves left forgotten in Blackrock’s depths. Nefarian has taken to tinkering with them, and he’s adjusted his pet project’s “Murder” setting to 11.[1]

World of Warcraft[edit | edit source]

"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." - Lord Victor Nefarius

From Wowpedia:

The Omnotron Defense System, also known as Tron Council and the Omnotron Council 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.

Dungeon Journal

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.

Trivia[edit | edit source]

  • The boss' emote response dialogue echoes Annoy-o-Tron's summoning quote Hello! Hello! Hello!, with the response apparently downloaded by the Omonotron Defense System as part of an OS update.

Gallery[edit | edit source]

Omnotron Defense System, full art
Omnotron Defense System in World of Warcraft

Patch changes[edit | edit source]

References[edit | edit source]