Ender rays

These would look like Sting rays but be black and purple, and shoot deadly purple rays at players, and other mobs not native to the End. They can fly and normally land to rest on one of the outer islands. If killed they drop a ton of EP and an Elytra (very damaged). If given food when they are sleeping on the outer islands they will be tamed and you can ride them through out the End and even into the Overworld via the portal!