You have mastered the art of using your physical body to enpower and enhance your spells, at the cost of your own vitality.

During a short or long rest, you may change your spell attack and save DC to your constitution modifier, replacing your current one.

When you cast a spell of 2nd level or higher while in this state, you take 1d4+the spell's level in magical damage, but may add this to your spell's damage as a bonus action.

If you cast a spell that consumes a material component (such as Revivify), you take an additional 2d8 damage per spell level and gain 1 point of exhaustion.