This (if it works) is a hacking mod. I don't really need more clarification, but Curseforge makes me tell you (to subscribe!) how this works.
I think It'll work on servers if it doesn't oh well, use it to troll your friends or something.
Offense:
Right-click will shoot a random negative potion, harming, slowness, poison, strong harming, and weakness.
Shift-right-click will shoot the potions above in a lingering varient.
Defense:
Right-clicking on a mob will give regeneration to the entity you clicked on.
Sneak-right-clicking on a mob gives regeneration to yourself.
Flight:
Up arrow give you levitation for 1s spam-clicking is recommended. (Only works mid-air (you'll have to jump))
Shift-mid-air you kinda hover, similar to a jetpack in something like Create.
Down arrow gives slow falling (again rapid click)
I'd say that's all this mod has to offer.
See ya! And don't get banned.