This Minecraft papercraft is Guardian, a hostile mob, the paper toy is created by frownieman. Guardian only spawns underwater in ocean monuments. Its eye will always look towards the viewpoint of a nearby player. It also has a larger, grey, mini-boss variant called the Elder Guardian.
The Guardian attacks by sending out a large laser beam which harms the player. In addition, Guardians can target and damage players who are riding in boats; however once the player is out of range, the Guardian's laser will disengage from the player, and deal no damage. For more information please click here.
You can download the papercraft toy here: Minecraft Papercraft - Guardian Free Template Download