Nekron

Nekron is a supervillain appearing in comic books published by DC Comics, primarily as an enemy of the Green Lantern Corps. Created by Mike W. Barr, Len Wein and Joe Staton, the character, who exists as an embodiment of Death, first appeared in Tales of the Green Lantern Corps #2 (June 1981). He is the primary antagonist in the 2009–2010 Blackest Night storyline.