Blood Spilled Covenant

Disclaimer: This spell is designed for the Grim Hollow Sangromancer subclass, and will be less useful for other wizards.

By transfusing some of your own blood into them, you regenerate the wounds of your allies.
This spell expends one of your d12s, if you have none left, then this spell will cause you to take 1d12 damage as the cost instead.
This spell heals one ally for an amount of hitpoints equal to 1d10 + Half your wizard level. This spell has no effect on creatures that do not have blood.

Upcasting:

For every level you upcast this spell by, you may increase the healing by an extra 1d10.