Minecraft should add a new mob called an alien. They would be a neutral mob that flies UFO's and can abduct mobs and gather blocks. The UFO's would spawn at render distance and flies around and abducts stuff. If you get abducted, they will do experiments on you which anything can happen to you. They also spawn on the ground and when provoked, they will shoot lasers which is an insta kill if it hits. If you kill an alien, you get their gun. They may also build an alien spaceport to make UFO's. There will be a rare occasion (five times the rarity of rain) that there will be an alien invasion where many UFO's spawn and try to shoot you from the air along with villagers. A bunch of aliens spawn on the ground and become hostile mobs and try to kill you and villagers.