Allister's Hematic Orb

You can conjure a orb of blood magic to target a creature in range. These orbs become stronger the greater your injuries are. Make a ranged spell attack against a target. On a hit, that target takes 1d8 necrotic damage. If you are below half your hit point maximum, you can add your spell casting modifier to the total damage.

At Higher Levels The spell’s damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).