Dungeons Difficulty: Customizable difficulties

I think it would be cool if we were able to make our own difficulty for our selves! Like how challenging would it be to play creeper woods with only creepers in the level, and they all have deflect, quick, and chilling. That would be cool. Or you must fight the Arch-Illager, but you can only use ranged weapons. I believe the possibilities are endless! And maybe there can a level where no can't take any form of damage, and all the enemies are armored pillagers. Did I say too much on here, or did I just came up with some of the most evilish difficulty ideas ever?