Blood Bullet

Make a range spell attack against a creature you can see within range. Every use the caster loses 1 hit point. On a hit, target takes 1d4 piercing + Spell Casting Mod. If the caster has temporary hit points, this spell subtracts from the temporary HP before the standard HP.

"You point at an enemy you can see in range. The tip of your finger bears a tiny pain, in an instant a bead of blood shoots at your target piercing them. Inside the target the bullet transforms into glass-like shards than pierces the internal bits."