ideas for books

I thought the winx meeting a good dark beeing on the level of a demon lord would be funny

Mc will be a reincarnator, i was thinking of his initial kit being: slime racial skills, predator, great sage, that-auto-translation-skill-i-forgot-the-name-of, degenerate, hatched demon lord seed, magicule breeder reactor and human form. No veldora

Mc will not be the original rimuru from the tensura anime, but he will have his memories

For how mc will get into the universe, i may make the trix attempt to summon a powerful dark beeing to make it their minion, but rob will put mc there instead and he will very much NOT become someone's minion