Bahseth's Soul Sap

Soul Sap fires four or more spectral missiles into one victim up to 90 feet away directly damaging the soul of the victim and stealing some of its life force to replenish the caster's health. The caster must make an attack roll to hit. On a successful hit, the caster rolls 4d4 dice. The caster selects a minimum of 2 dice to inflict necrotic damage to the victim but can choose to use the other dice to heal the caster instead of causing damage. The dice may be chosen after the roll is made.  

 At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the spell creates one more spectral missiles for each slot level above 2nd.