Rampart

Your will has further manifested into the ability to protect yourself and others. This manifestation is a pool of d12s equal to half your level (minimum of 1). When a creature takes damage within 10 feet of you, you can use your reaction and spend up to a number of these d12s equal to your proficiency bonus to negate the damage taken. If this drops the number of damage taken to 0, can spend another die from your pool and roll it; the number rolled is the amount of damage you send back to the creature and/or object that caused the damage.