Spike Skin [two-actions] Feat 8Earth Impulse Kineticist Primal Source Rage of Elements pg. 27
You touch a willing creature, causing its skin to harden and form spiky protrusions. The target gains resistance 4 to all physical damage (except
adamantine). Whenever a creature damages the target with an
unarmed attack or non-
reach melee weapon, the attacking creature takes 2 piercing damage.
This impulse lasts for 10 minutes, but each time the target takes physical damage, the duration decreases by 1 minute. The target is temporarily immune to this impulse for 1 hour. If you use Spike Skin again, any previous one ends.
Level (+2) The resistance and damage each increase by 2.
Traits
Earth: Effects with the earth trait either manipulate or conjure earth. Those that manipulate earth have no effect in an area without earth. Creatures with this trait consist primarily of earth or have a magical connection to that element. Planes with this trait are mostly solid, with caverns and other hollow pockets.
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.