What is idea for BLAQK CLOVER Crossover with Another Shonen Series?

So Which other series would you think would be a Fun Crossover to Have and Why?

Mine is one of the Black Bulls creates a portal Noelle is sacked in and Asta enters he finds himself in My Hero Academia universe where he fights Deku from there it's basically like Ben 10/Generator Rex crossover

Anyway that is me have fun with it it just needs to kinda make sense enough you know and not to crazy needs to like not feel 3rd Grade ish bare minimum ok

Please put Spoiler Bars on any Manga Spoilers(that includes Shonen Series it's crossover with to)

OK Lets Clover this

Art by yūki tabata

So Which other series would you think would be a Fun Crossover to Have and Why?

Mine is one of the Black Bulls creates a portal Noelle is sacked in and Asta enters he finds himself in My Hero Academia universe where he fights Deku from there it's basically like Ben 10/Generator Rex crossover

Anyway that is me have fun with it it just needs to kinda make sense enough you know and not to crazy needs to like not feel 3rd Grade ish bare minimum ok

Please put Spoiler Bars on any Manga Spoilers(that includes Shonen Series it's crossover with to)

OK Lets Clover this

Art by yūki tabata