Allied Spellcaster (Feat)

With the aid of an ally, you are skilled at piercing the protections of other creatures with your spells.

Prerequisites: Caster Level 11

Benefit: Whenever you are adjacent to an ally who also has this feat, you receive a +3 competence bonus on caster checks made to overcome spell resistance.

Special: If your ally has the same spell prepared (or they know the spell and have an appropriately-leveled slot available, if they are spontaneous spellcasters), you also receive a +1 bonus to the caster level of the spell you are casting for all level-dependent variables, such as duration, range, and effect.