Syphoning Slash

You brandish the weapon used in the spell’s casting and make a melee attack with it against one creature within 5 feet of you. On a hit, you syphon the life from the target, dealing an additional 1d8 necrotic damage. You gain temporary hit points equal to half the necrotic damage dealt.

The spell’s damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8). At level 11, the temporary hit points gained in now equal to necrotic damage done.

You gain no temporary hit points when used against targets with no blood.