Chant

By means of the chant, the cleric brings into being a special favor upon himself or herself and his or her party, and causes harm to his or her enemies. 

Once the chant spell is completed, all attacks, damage and saving throws made by those in the area of effect who are friendly to the cleric are at +1, while those of the cleric's enemies are at -1. This bonus/penalty continues as long as the cleric continues to chant the mystic syllables and is stationary. 

An interruption, however, such as an attack which succeeds and causes damage, grappling the chanter, or a magical silence, will break the spell.