The Holy Emperor's Grandson Is a Necromancer

After a near-death experience, something has changed about the Holy Emperor's troublemaker of a grandson. To be precise, his body was taken over by a Korean man who died while playing a VR video game! But when his necromancer character is mixed with a Holy Prince's blood, things start getting funky. The zombies he makes are incredibly nice, his curses start healing people, and the girl he saved from being turned into a zombie suddenly gains super strength. Now he has to play the hero, but he'd really rather just go for a nap.

(Source: Webtoon Entertainment)