Watcher

The Watcher (sometimes nicknamed as "Abomination") is a huge creature known for its one large eye. Don't underestimate it, it might not seem that intimidating at first glance, but these are powerful monsters. They have only one attack, but it's pretty strong: laser vision. That's right, the only way a bulbous creature like this can attack at all is to shoot energy rings from its eye (most likely why it's called a Watcher).