Nekron is the entity of the Black Light of Death. He is trapped in the Land of the Unliving which he lords over. He has made numerous attempts to break free of his realm, often assisted by the Black Lantern Corps.
Nekron was created by Mike W. Barr, Len Wein and Joe Staton, first appearing in Tales of the Green Lantern Corps #2 (1981)
Multiverse
Other Media