Dream Eater

The Dream Eaters are an alien species supposedly thought to be extinct in the Marvel Universe.

Physiology
As the names suggests they are a species that devourers dreams and are regarded as dangerous lifeforms. They are eldritch beings with an upturned face and a mass of bungling eyes.

History
The Collector had the last living Dream Eater in his collection before the Guardians of the Galaxy destroyed his facility.

Source

 * Guardians of-the Galaxy: Mission Breakout 001 (2017)