Spectre

From MUME

Spectres are aggressive level ? mobs. They are summoned by Nagrorh, and will follow and assist him while he's alive.

A frightful spectre comes to you, extending his unnatural arms.
>examine spectre
The ghost is dressed like some sort of ancient priest, its face pale
and expressionless. From the head and down its substance slowly fades
away to become totally transparent near the feet, making the ghost
float softly above the ground.