ThunderCats Roar

Mumm-Ra, The Ever-Living (1x16)

Air date: Apr 11, 2020

Every time Mumm-Ra gets ahold of a magic artifact to restore his powers, the ThunderCats just smash it and turn him into a dinky skeleton again. Until today that is, because Mumm-Ra just remembered he's got the Ancient Spirits of Evil on his side.