Blood Pact

Talos has chosen you as his herald of pain and vengeance. When, during a combat, you deal more than 10 lightning damage to a creature with a single attack (physical or magical), the Storm God grants you an extra 1d6 to use as lightning damage or to heal a friendly creature with your touch in the next round. The dice increase to 2d6 with 20 lightning damage dealt, 3d6 with 30 damage, and so on. Extra dice must all be spent in the same round; they cannot be accumulated with previous or subsequent attacks.