Aerial Boomerang [two-actions] Feat 1Air Impulse Kineticist Primal Source Rage of Elements pg. 24
A blade of shearing wind races away from you in a 60-foot line. Each creature in the area takes 2d4 slashing damage with a
basic Reflex save against your class DC. In the final square of the line, the boomerang whirls in place until the end of your next turn. Any creature that ends its turn in that square has to save against the boomerang.
On your next turn, you can use a single action, which has the
concentrate trait, to return the boomerang to you. It returns in a line from its square to your current location, with the same effect as the initial line, then the impulse ends. You must have line of effect to the boomerang and be within 60 feet of it.
Level (+2) The damage increases by 1d4.
Traits
Air: Effects with the air trait either manipulate or conjure air. Those that manipulate air have no effect in a vacuum or an area without air. Creatures with this trait consist primarily of air or have a magical connection to that element. Planes with this trait consist mostly of open spaces and air with various degrees of turbulence, though they also contain rare islands of floating stone and other elements and energies.
Impulse: The primary magical actions kineticists use are called impulses. You can use an impulse only if your kinetic aura is active and channeling that element, and only if you have a hand free to shape the elemental flow. The impulse trait means the action has the concentrate trait unless another ability changes this. If an impulse allows you to choose an element, you can choose any element you're channeling, and the impulse gains that element's trait.
Primal: This magic comes from the primal tradition, connecting to the natural world and instinct. Anything with this trait is magical.