By the casting of this spell, a cloistered priest can temporarily gain the ability to turn undead (if good or neutral) or command them into service (if evil). For purposes of determining success or failure of the turning (or commanding) attempt while the spell is in effect, the level of the cloistered priest is that of an adventurer-priest minus four levels. Thus, a 7th level cloistered priest turns undead as a 3rd level adventurer-priest.
Notes: Restricted to cloistered priests. (Updated from Dragon Magazine.)