Blood Gout

You hurl a needle thin gout of your own blood at a creature you can see within range. Make a ranged spell attack against the target.

On a hit, the target takes 3d6 necrotic damage, and you gain temporary hit points equal to half the necrotic damage dealt (round down) as the stolen blood surges back into you.

Blood Price: Whether you hit or miss, you take 2 necrotic damage. This damage ignores resistance and immunity. This counts towards Vampiric Transformation. 

No Blood, No Feast: If the target is a construct, elemental, ooze, or undead, you still make the attack, but you gain no temporary hit points from the spell.