From Pathfinder Rage of Elements, which isn't enabled.

Imperious Aura

FEAT 16

Activity free action

Prerequisites one or more stance impulses that affect your kinetic aura

Trigger Your turn begins.

Your glowing and majestic kinetic aura marks you as a true child of the elements. Use a stance impulse that affects your kinetic aura.

Pathfinder Rage of ElementsOGL