Triangle Shot 
Feat 18
Source Pathfinder Player Core 2
Prerequisites Monastic Archer Stance, Stunning Blows
Requirements You are in Monastic Archer Stance and wielding a bow usable with that stance.
You string three arrows to your bow and fire them all at once. Make three ranged Strikes against a single target with the required weapon, each using your current multiple attack penalty, and you take an additional –2 penalty. This counts as two attacks when calculating your multiple attack penalty, and you combine the attacks' damage for the purpose of resistances and weaknesses. Your Stunning Blows benefit applies to Triangle Shot, even though it isn't a Flurry of Blows. If all three Strikes hit, the target takes 3d6 persistent,bleed damage.
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.
FortuneA fortune effect beneficially alters how you roll your dice. You can never have more than one fortune effect alter a single roll. If multiple fortune effects would apply, you have to pick which to use. If a fortune effect and a misfortune effect would apply to the same roll, the two cancel each other out, and you roll normally.
MonkAbilities with this trait are from the monk class. A weapon with this trait is primarily used by monks.