Echoing Spell Feat 18
Source Pathfinder Advanced Player's Guide
You time the components of your spell with exacting precision, setting up a resonance that duplicates the spell's effects.
If your next action is to Cast a Spell of 4th level or lower that has no duration, the spell's energy reverberates and echoes. You can Cast the Spell a second time before the end of your next turn without expending a 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.
ConcentrateAn action with this trait requires a degree of mental concentration and discipline.
MetamagicActions with the metamagic trait, usually from metamagic feats, tweak the properties of your spells. You must use a metamagic action directly before Casting the Spell you want to alter. If you use any action (including free actions and reactions) other than Cast a Spell directly after, you waste the benefits of the metamagic action. Any additional effects added by a metamagic action are part of the spell's effect, not of the metamagic action itself.
SorcererThis indicates abilities from the sorcerer class.