Prerequisites: Constitution 13 or higher & Strength 13 or higher
With great fortitude of body and experience in battle, you have learned to emulate adamantine both offensively and defensively. You gain the following benefits:

• Weapons you wield are treated as adamantine. Your unarmed strikes are similarly treated as adamantine weapons.
• When an attack roll made against you would score a critical hit, you may use your reaction to negate the critical hit, causing the attack to instead be treated as a normal hit. 1/Long rest