MANASTORM "BACKGROUND COUNT"

A background count is a measurement of disturbances in the
astral plane that affect the flow of magic. Background count
make it harder to cast spells, resist drain and perform any
other astral activity. Powerful disturbances can cause manawarps. 
These are dangerous storms on the astral plane that can kill 
dual natured or projecting life forms.

The opposite of a background count is a power site.

^WSee Also: CLEANSING, POWER SITE^n