Zark is a character in the animated series The New Adventures of He-Man.
Zark was originally one of the Evil Mutants from the planet Denebria. At one point he was banished to the planet Omega-4 by Skeletor. Zark was a two-headed, dragon-like mutant who served another mutant named Maxis and obeyed his every command. They both wore cold weather gear because Omega 4, was a frozen waste land.
Together, Maxis and Zark, put the sparse human population of Omega-4 to work as slaves mining a deadly gas called Black Omega, which had the power to destroy the planetary shield of Primus.
After being defeated on Omega-4, Maxis and Zark moved to another galaxy.