Insomniac

This creature is a dragon with multiple eyes on its body that glow green when it's about to use an ability. There are multiple sharp tooth smiling mouths on its body that can be opened like zips and are capable of absorbing large objects like ships, and trucks anything absorbed by the dragon goes to a void-like dimensional space to be digested. The concept of the dragon's ability is being able to sink into the space that a shadow occupies and being able to teleport from shadows making for a good creature to be in a stealth-based video game as an enemy or main character.