Undead grunthors are creatures from a nightmare dimension where the living dead are common. They are the nightmare dimension's counterparts to the grunthors.
History[]
Rift Apart[]
The collapsing of the dimensions brought about by the Dimensionator's destruction had caused undead skeletal creatures from a nightmare dimension with a blue flame in their bone bodies and glowing red eyes, to begin breaking through rifts to Rivet's dimension and attacking indiscriminately. Amongst these creatures are skeletal undead grunthors, incapable of feeling pain with boosted durability, damage output and ferocity. A notable undead grunthor named Sue, was used by Zurkon Jr. at Zurkie's Battleplex in the Bronze Cup challenge "A Grunthor Named Sue" along with undead skeletal undead sandsharks and is fought again later in the Gold Cup challenge "Twice as Nice". Sue was said by Zurkon Jr. to have ruled over Sargasso long ago.
After Emperor Nefarious' overuse of the new Dimensionator, a great number more of these creatures appeared, including another undead grunthor who is fought on Savali in the catacombs, along with several undead skeletal variations of the Goons-4-Less called undead goons.