This is the 마교교주(Magyo Gyoju).

Yes! That's right! That's the scene 😊 I didn't know because I didn't read the translation.

This is a scene from episode 990 of the novel. It's not a devil, it's a martial arts world. :)

당분간은 이쪽 저쪽 같이 올려볼려고ㅠㅠㅋㅋ 저쪽엔 방지 필터써서 올려야겠어ㅠ