Overseer

Overseers are enemies that have a chance to replace Endermen in the night. These creatures are neutral. Normal way of being provoked, but there's only one exception: The enemy can't be blinded by anything like Dusty Milk or anything like that, but it still provokes them. They are immune to Lava and Water, and spawn more often in the darkness. Their attacks is to run into you, being affected by Blindness II, Nausea II, Poison III, and Weakness III when you get hit. The other attack is to shoot eye beams that applies the same effects but without Nausea and pulls you toward the Overseer itself.

NOTE: You can make a picture of the Overseer itself if you're interested. Although it's supposed to look like pure black with a purple eye that turns into a bloody red color and will have a almost creepy mouth when provoked.