There is a Legacy version
here.
Impossible Volley [three-actions] Feat 20*Fighter Flourish Ranger Source Player Core pg. 150 2.0Archetypes Archer,
Eldritch ArcherRequirements You are wielding a ranged weapon with the volley trait and reload 0
* This version of the Impossible Volley feat is intended for use with an Archetype and has a different level for access than the
original feat.
You fire a volley at all foes in an area. Make one Strike with a –2 penalty against each enemy within a 10-foot-radius burst centered at or beyond your weapon’s volley range. Roll the damage only once for all targets.
Each attack counts toward your multiple attack penalty, but do not increase your penalty until you have made all your attacks.
Archetype Use
This feat can be used for one or more Archetypes in addition to the listed Classes. When selected this way, the feat is not considered to have its class traits.
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.