I'm not sure yet but I know there will be quite a few

the year of kusakabe is a suprise for now but if you want recommendations of what inspired kusakabe there's. gleipnir , akame ga kill, black bullet, attack on titan, berserk, hellsing, kabeneri of the iron fortress

well the demon king is real but he doesn't leave his real also yonome might have been on something when she was saying that

OK I emailed you it would be great so see my work hit a higher audience