Enderbeasts

Enderbeasts naturally spawn at the end islands. They are under the surface and look like blocks, but if you step on them you get caught and can' t escape anymore. The only ways to escape are feeding it with some food so it is not hungry anymore or you pearl out. If you are out, you can attack it with a sword. If you dont get out, the enderbeast will stand up and walk toward the nearest void and jump in it so you will die. If you are able to make it out and you kill it, it drops "enderflesh". You can roast enderflesh or eat it raw. I think you should be able to live in the end by getting food, and this is one way.