Ephemeral Swarm

Tiny Undead (Incorporeal, Swarm)

Source(s):	Monster Manual 3
Alignment:	Usually Chaotic Evil
Climate/Terrain:	Ethereal Plane
Organization:	Solitary
Challenge Rating:	5
A ghostly swarm of rats, or other many tiny creatures that suffered a common death, that float silently over the surface they travel upon. They return from the dead, seeking to inflict paina nd suffering similar to that which they experienced upon their deaths.