Beholder

The beholder is a creature with the body of a large fleshy orb with a huge mouth and a single eye above it. The top of it's head is adorned with smaller eyestalks. They have powerful magical capabilities, and the smaller eyes are often imbued with different powers.

Source
The beholder originate from Dungeons & Dragons.

Media
Beholders appear in the following media:

Games

 * Crypt of the NecroDancer
 * Crypt of the NecroDancer