Bluster

A bluster is a term in most Terran cultures referring to a ghost, demon, wight, monster, or spirit. It is conceived of as a usually-malevolent creature of varying physicality and threat level which might harm, haunt, or even kill salticids.

In the Proto-Terran Religion and its descendant belief systems, the most well-known bluster is Moonbluster, a godlike parasite expected to end the world.