Color of Armament Adept

Your specialization into Armament Haki empowers your use of it, granting you the ability to coat yourself in a black sheen that protects like armor. You gain the following benefits.

Hardening. As a reaction when you take damage, you can harden your skin like jetblack armor and grant yourself resistance to all the triggering damage.

You can use this feature a number of times equal to your proficiency bonus and regain all uses when you finish a short or long rest.