Doomstone

Doomstone's origins are unknown, but he does seem to be a being of some importance in Lord Zedd's graveyard forest dimension. With Tommy trapped in the dimension, thanks to Goldar, Doomstone stripped Tommy of his Morpher, then summoned RoboGoat and Pumpkin Rapper to help him destroy the White Ranger once and for all. When Billy and Kimberly arrived to rescue Tommy, Doomstone resurrected Primator, Rhinoblaster, Invenusable Flytrap, and Snizard, all of which were quickly defeated by the three Rangers. Doomstone was never destroyed and is most likely still in the graveyard dimension.