Oldak coil detail

The Oldak coil is an Invention device that is a part of the cave goblin tech tree. It requires 55 Goblin Currency and level 70 Invention to unlock. It is a Magic variant of the dwarf multicannon. The Oldak coil takes up a 3x3 area of space when deployed, and it can attack all targets within a 9x9 area. The experience gained from using the Oldak coil is dependent on the player's Magic XP selection in their Combat Settings.[1]

Success in creating the blueprints earns 10,518 base Invention experience, or 52,591 experience at perfect optimization.

The Oldak coil requires cannonballs as fuel, consuming one every time it attacks (even if it hits multiple targets), and it has a cannonball capacity of 30. When active, any enemy that is in range will be repeatedly attacked by bolts of lightning, and it can hit up to three enemies at once. It benefits from the same perks as the dwarf multicannon if unlocked, increasing the cannonball limit to 60 or 90 and allowing it to restock automatically if the player is in range.

Unlike the dwarf multicannon, the Oldak coil takes up only one space in the player's inventory. Also, it cannot be reclaimed from a non-player character if lost; players must build another one. For example, it will be lost permanently if it decays. However, it can be used indefinitely if you keep picking it up and re-deploying it when you receive the decay warning.


Oldak coil Oldak coil
InventionSmithingMake-X GE icon
2,760 XP250 XP-
Invention Invention level70
Blueprint (Invention) Discover: Oldak coil
P2P icon Members onlyYes
Rune barRune bar22,9985,996
Metallic partsMetallic parts150N/A-
Heavy componentsHeavy components15N/A-
Imbued componentsImbued components15N/A-


  • It is likely a reference to the Tesla coil which produces arcs of electricity.
  • When used in the Tower of Voices in Prifddinas, it reads "The vibrations from Seren's song would stop the cannon from functioning here."
  • Originally, it required 1,725 Inspiration to discover.
  • Lost Oldak coils could be temporarily reclaimed from Nulodion since 17 September 2018 due to a bug where players could occasionally not pick up their coils.


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