Kulou Jinhua: Cong Bei Nüshen Zhaohuan Kaishi

Jiang Cheng is reborn into a game world as a skeleton summoned by a beautiful necromancer player? The kind of skeleton that's worthless even as cannon fodder! Fortunately, he has an infinite evolution system! From now on, this game has got itself a a god-level skeleton, the kind who will wipe out players and make NPCs beg for mercy.

(Source: Kuaikan, translated)