Forbidden Arts (Blood Channeling)

Channeling the power of blood is a skill frowned upon in most arcane circles, though that never seemed to stop you. You gain the following benefits:

• You gain one additional hit die.
• You may use an action to spend any number hit dice to create a single spell slot. The spell slot's level is equal to the number of hit dice spent. If you do, take damage equal to twice the number of hit dice spent. This damage can't be reduced or prevented in any way. You cannot create spell slots higher than the highest level of spells slots you can have naturally, and no higher than fifth level.