I was confused of the translation so i decided to read the novel. The technique demon lord gave to mc is basically strengthen one's qi, by taking from others by having sex, in xianxia it's similar to dual cultivation. He can use it on the spot bc mc has been receiving demon lord's yang energy. If mc has intercourse w multiple people it could backfire bc each yang energy received will be different and thus be impure and dangerous for the body but bc mc only receive from him, mc is guaranteed for the best yang energy lol
Ch 77 is kinda messy lol. SPOILER ALERT
I was confused of the translation so i decided to read the novel. The technique demon lord gave to mc is basically strengthen one's qi, by taking from others by having sex, in xianxia it's similar to dual cultivation. He can use it on the spot bc mc has been receiving demon lord's yang energy. If mc has intercourse w multiple people it could backfire bc each yang energy received will be different and thus be impure and dangerous for the body but bc mc only receive from him, mc is guaranteed for the best yang energy lol