Bloodbriars

You point at a creature you can see within range who has already taken damage and cause their blood to solidify into spikes all throughout their body. The target makes a Constitution saving throw, taking 6d10 piercing damage on a failed save or half on a successful one. This spell has no effects on undead, constructs, or targets with full hit points.

Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot above 4.