Watcher

' Watchers''' are Skeletons found in The End. They are Level 55 and have what appears to be a Summoning Eye on their head. They are often found near the middle and back areas.

This mob deals 475.

Description
The Watcher wields a bow (presumably the End Stone Bow) and will alternate between shooting normal arrows and Level 40 Endermites.

As players often ignore Watchers and Endermites in favor of killing Zealots for Summoning Eyes, the spawned Endermites and Watchers often accumulate in large amounts.