Aerial Boomerang
A blade of shearing wind races away from you in a 60-foot line. Each creature in the area takes (scaling +2)d4 slashing damage with a 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
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 connection to magical air.
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.
This indicates abilities from the kineticist class.
This magic comes from the primal tradition, connecting to the natural world and instinct. Anything with this trait is magical. A creature with this trait is primarily constituted of or has a strong connection to primal magic.