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There is a Legacy version here.

PFS StandardWhirlwind Strike [three-actions] Feat 14

Barbarian Fighter Flourish 
Source Player Core pg. 150 2.0

You lash out in a blur of motion, attacking all nearby adversaries. Make a melee Strike against each enemy within your melee reach. Each attack counts toward your multiple attack penalty, but you do not increase your penalty until you have made all your attacks.

Traits

Flourish:

Flourish actions are actions that require too much exertion to perform a large number in a row. You can use only 1 action with the flourish trait per turn.