The Ender Guardian

The Ender Guardian is the Grand Guardian of the End. He is said to have been the entity that had trapped the Ender Dragon and imprisoned it, cursing it to become his pet, set to destroy unlucky players who step into the Dragon’s den unprepared. To ensure the Ender Dragon would suffer for eternity, he bounded the Dragon to the island using End Crystals mounted on tall Obsidian pillars which only a player could destroy, further tormenting the Dragon. The Ender Guardian lives deep within the End Islands but can rarely be seen in the overworld. When present nearby a player, all Endermen nearby suddenly become aggressive and attack the player. On top of that, more endermen spawn than normal and are unusually much more fast and deal more damage. The Ender Guardian has the ability to break blocks like End Portal Frames, seeing as though he controls the Gateway between the Overworld and the End. He has the ability to teleport like all endermen, control mobs in both the end and overworld, summon dragon breath, summon endermen, inflict slowness and blindness on the player, inflict instant damage on the player and telekinesis.