This world is a terrible challenge I cooked up, I would not recommend playing, it is a survival world. Please don't play this if you value sanity. The goal in this is just to try and have fun in a thing that is not fun.
I already stated how the features affect the user.
Arbitrarily Required Description of Features:
Everything deals more damage
Too many phantoms at night
hunger during the day constantly
creepers are invisible
zombies are faster
vexs are faster
evokers are invisible
Note From author:
If somebody beats this I'll make a harder version