Blood Splatter

Roll a d6 and take the DMG as you use the Dagger to draw your own blood and fling it in a 15 ft cone in front of you. All creatures within range must make a DEX save or take 1d8+Spell ATK mod Necrotic DMG, or half on a successful save.

After dealing damage, roll a CON check against your own Spell Save DC. On a success, you regain half the DMG dealt by this attack in HP.