Accompany Feat 8
Source Pathfinder Advanced Player's Guide
Trigger An ally within 30 feet Casts a Spell.
You use your performances to supplement an ally's spellcasting, providing magical energy for their spells.
Attempt a Performance check, using a very high DC for the ally's level (Core Rulebook 503-504), and either spend a Focus Point (if the triggering spell is a focus spell) or expend a spell slot at least 1 level higher than the triggering spell. If you succeed at the Performance check, your ally's spell doesn't cost the Focus Point or spell slot.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
BardThis indicates abilities from the bard class.
ConcentrateAn action with this trait requires a degree of mental concentration and discipline.
ManipulateYou must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can't perform actions with this trait. Manipulate actions often trigger reactions.