Chant

By means of the chant spell, the priest brings special favor upon himself and his party, and causes harm to his enemies. The spell is exacting and should you willing move, take an action, bonus action, or reaction your concentration ends.
Beginning on your next turn, all attack and damage rolls and saving throws made by those in the area of effect who are friendly to the Cleric gain +1 Chant bonuses, while those of the priest's enemies suffer -1 Chant penalties.
This bonus/penalty continues as long as the caster continues to chant the mystic syllables and is stationary.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher,  Chant's bonus and penalties move to +2/-2.