This mod adds a new mob to the End (and Warped Forest): The Endertaur.
The Endertaur is a neutral mob and can be used for different things. You can milk it to get a new liquid and craft items like Ender Pearls with it. Upon killing it, there's a chance to get Endertaur Hide and Horns, with these you'll be able to craft new items such as the End Lamp or the Endertaur Trophy as well as vanilla items like Leather or Glowing Item Frames. You can also breed them using Chorus Fruits.
