Sauron

Lykos was an inhabitant of the Savage Land, who knew and was friends with Ka-Zar. Lykos was the victim of Mister Sinister's experiments, forced to feed on energy and transformed into Sauron upon mutant contact. Sauron aided Mister Sinister in his efforts to destroy the X-Men.

He later attempted to conquer the Savage Land for himself, but was ultimately defeated. With no mutants left in the Savage Land, Lykos was free to live in peace and welcomed into Ka-Zar's tribe.

In the Comics
Sauron's complete name is Karl Lykos. he comes from the US instead of the Savage Land, but Sauron has tried to take over the Savage Land in some comic storylines.

He got his powers being bitten by mutants pterodactyls from Tierra del Fuego, which is a reference to the origins of werewolves as humans bitten by wolves.

Besides the powers shown in the series, comicbook Sauron possesses fire breath and a sonic scream.