From Pathfinder War of Immortals, which isn't enabled.

Flow of War

FEAT 6

Activity free action

Frequency once per hour

Trigger Your turn begins.

Divine battle instincts take over your body, letting you move and lash out with instinctive speed. You become Quickened until the end of your turn and can use the extra action only to Strike or Stride.

Pathfinder War of ImmortalsORC