Future Mob Vote: Dimensional Rift

This idea is for a future year, and is not applicable when I posted it (I posted it at this time so it could gain votes. Technically it's possible, but I don't want the Overworld to be involved). This would work once a fourth dimension is added.

Mob 1 is native to the Nether, mob 2 is from the end, and mob 3 is found in the fourth dimension. I don't know what the mobs would be, but I hope you like the concept! Thanks for reading!