Primeval Power - Blood Magic

When you no longer have spell slots remaining, you may regain a temporary spell slot with a level equal to the number of 1d10 necrotic damage die you take against your hit points. This damage bypasses resistances and immunities.

 Using this ability, you cannot restore a spell slot to a level higher than you can currently cast. A slot generated this way must be cast within 10 minutes. This ability can be used up to 2 times before a long rest.

 Due to the dark nature of Blood Magic, healing spells cast on you by external sources are reduced to 1/2 of their potency until your next long rest.