Sanctify

Sanctify was a conjuration spell that allowed one or more priests to temporarily dedicate an area to their deity, creating a zone beneficial to followers of that deity and those of the same alignment, and detrimental to undead. The reverse of this spell, defile, did the same for evil priests and made it more difficult to turn undead.

Effects
One priest could bless a 30 ft (9.1 m) square, with each additional priest (of the same deity) adding an additional square. The duration was a number of minutes determined by the level of the most experienced priest plus a couple minutes for each additional caster. While the spell lasted, the area became holy to followers of the deity, boosting their morale and becoming more resistant to fear- and charm-based attacks as long as they remained in the consecrated area. Friends of the same alignment but different faith were also encouraged, but not to the same extent. Those in the zone wishing to harm the priests or their friends were more susceptible to fear and charm effects, and undead were easier to turn.