The Interstellar Ion Cannon is a space cannon developed by the Kingdom of Doom under the administration of King Zarkon.

The cannon is capable of firing a shot that is multi-spatial, meaning that it can travel faster than light and destroy objects both in normal space and in hyperspace.

The cannon was built and tested on Planet Maura. Due to a series of events, the cannon was used against Doom, and Zarkon lost control of the cannon. [1]

Lotor later recovered the cannon, movied it to Planet Arus, and used it to destroy Galaxy Alliance ships. [2] But the Voltron Force managed to capture the cannon[3], an event leading to Lotor being arrested. [4]

The cannon was later used to clear a path for Voltron during the invasion of Doom. [5]