A mod that adds a bunch of potions that do different things:
Speed Potion
Does what its name entails, lets you run faster for a short period of time
$ 300
Heal Potion
Heals you
$ 200
Super Strength Potion
3 times your damage with weapons.
$ 400
The World Potion
All entitys in the facility freeze for 15 seconds.
$ 600
Disco Potion
All players screens change color for 15 seconds
$ 300
These are all just ideas, if someone does make the mod it would be fine with a few instead of them all. I will also be listing more as time goes on