Dragon Claws

Vicious claws grow from your fingers. They are unarmed attacks that deal 1d4 slashing damage and 1d6 extra damage of a type determined by the dragon in your bloodline. For the duration, you can use your charisma modifier instead of Strength for the attack and damage rolls of melee attacks using your claws.

At 5th level the extra damage increases by 2d6, and by 9th level the extra damage increases by 3d6.