Spell Relay Feat 6
Source Pathfinder Advanced Player's Guide
Trigger An ally Casts a Spell and you are within that spell's range.
You open the power in your blood to your ally's spellcasting, using your magic to boost their range. Your ally can use you as the point of origin for their spell, calculating range and cover from your space instead of their own.
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.
ConcentrateAn action with this trait requires a degree of mental concentration and discipline.
SorcererThis indicates abilities from the sorcerer class.