Brain Suckler

The Brain Suckler is a flying enemy spawned by the Nebula Pillar during the Lunar Events. It can latch onto the player's head, greatly reducing vision (similar to the effects of Blackout or Darkness) and dealing large amounts of damage.

Trivia

 * Brain Sucklers appear to pay homage to the iconic Headcrab enemy from the Half-Life series, as they attack by latching onto a player's head. The monster was originally named Nebula Headcrab, but was changed during development to Brain Suckler..
 * Fittingly, rather than using their own name, they drop the Nebula Headcrab Banner.

History
Suceur de Cerveau