Thundrillium is an element found on Thundera and Third Earth that the ThunderCats use to fuel their vehicles and power the Cats' Lair.
Overview[]
To process Thundrillium, it is melted down and poured. This usually takes place within Cats' Lair, often overseen by Panthro and Tygra.
Appearances[]
- All that Glitters (first appearance)