Sometimes, a spirit comes into contact with a Tainted being. These encounters are usually fatal for one or both parties involved, but on occasion a spirit survives the ordeal only to find itself infected with Taint. Two possible results ensue if the spirit cannot somehow rid itself of the Taint: the spirit sickens and dies poisoned by the Taint in its system or gradually transforms into a full-fledged creature of Taint. The second outcome is extremely rare, but when it occurs it releases a dangerous abomination. A creature with the full powers of a normal spirit enhanced with the destructive forces of the Old Ones. Fortunately the life span of a Tainted creature can be measured in days or weeks. Unfortunately the destruction these beings can inflict during that time is considerable.
Tainted spirits are likely nature spirits, elementals and Fiends. Ethereals always perish if infected.