Overwhelming Blow Feat 16
Source Pathfinder Advanced Player's Guide
You throw your weight into a powerful attack that leaves you vulnerable.
Make a melee Strike. This counts as three attacks when calculating your multiple attack penalty. If this Strike hits, you get a critical hit. If you roll a critical hit, your attack also gains the deadly d12 trait.
Whether or not you hit, you become Stunned 1 and are Flat-Footed until the start of your next turn.
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.
FighterThis indicates abilities from the fighter class.