What have you added and what does it do? (Alternatively, what have you fixed and how does it work?)
Added a new hack, AntiPotion, which can disable any combination of Levitation, Jump Boost, Slow Falling or Dolphins Grace.
(Repeat of my old pull request which included an extra feature due to a mistake with branching.)
If applicable, add screenshots or videos to help explain your pull request.
If you want to make this Hack / Module Movement only you could also add the Slowness and Speed Effect.
Otherwise, you could also add the Night Vision Effect, the Invisibility Effect, the Wither Effect, the Blindness Effect, and the Glowing Effect.