Astral Ripper

Astral Ripperis an undead that is said to inhabit the New World.

Appearance
It can be presumed that a Astral Ripper have the appearance of a pure shadow.

Background
It was stated by Henjinmal that an undead called Astral Rippers appeared as masses of shadows which stalked the Valley of Shadows.

The Craftsman of Dwarf Arc
During Hejinmal's encounter Ainz Ooal Gown, the dragon had remember a group of Astral Rippers as one the various powerful undead creatures to have been recorded in legends.

Trivia

 * While Astral Rippers appeared in the shape of large shadows, a Shadow Demon has the ability to hide in someone else's shadow as one of their abilities.