Slushh

Slushh is a Sinestro Corps Soldier of Space Sector 3376, a globular being composed of acids which can liquefy flesh within seconds, leaving only the bones left to be carried around in his body.

He was imprisoned by the Warlords of Pisun in a red oil sea for millions of years until he was freed by a Qwardian Power Ring and joined the Sinestro Corps.