Copyman

Copyman are smaller enderman and only spawning in the end. If you watch them, they mirror copy your behavior. They won't stop unless you kill them. They are neutral, just like enderman. They can be a helpful new civilization in the end, but watch out, they mirror copy you... So after you watch them in the eyes... make sure you stand in the right position of the copyman.

For example: If you are standing side by side in the same direction... and you are building from left to right... it will build from right to left. If you two stand against each other with a distance of 20 blocks apart... and you are building 4 blocks in front... the copyman is building (20-4) 16 blocks in front of you another wall.

That can be quite annoying sometimes... so you may wanna kill them after you watch them. Fighting a copyman would be similar to an enderman.

Also, the building blocks that the copyman will use only blocks it can find around to grab. (like an enderman grab blocks random that they can find) So if you place your preferred blocks on the endground... it will use them... otherwise, it will use endstone (because there is almost nothing else in the end)