(Name of manga, please, because I like this character already. And then I'll drop the off-topic.)

Tbh I love the structure of this case -- it reminds me of the game series Zero Escape (characters forced to play deadly versions of innocent games via explosives attached to wrists) -- but Zu Ma himself is...??? I guess if he's part-Dixingren, then dark energy weirdness can maybe explain him not aging, but what is his actual power? Forcing people to play games? Then why isn't it working on Zhao Yunlan? Yeah, if I think about him for any time at all I start seeing question marks.