coagulation lash

0-level (Cantrip) Necromancy

You slice your open palm, creating a whip made of blood that will lash out at creatures within range. Make a melee spell attack against a target. If the attack hits, the creature takes 1d6 necrotic damage. You also regain hit points equal to the necrotic damage dice roll.   At Higher Levels. This spell's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).  

Warlock Invocations

Blood Rend

Prerequisite: coagulation lash cantrip When you hit a creature with coagulation lash, you may spend a Hit Dice to make an additional attack, up to a maximum of two attacks. Additional attacks must target creatures not yet damaged by Coagulation Lash this round.

Empowered Lash

Prerequisite: coagulation lash cantrip When you cast coagulation lash, add your Charisma modifier to the necrotic damage dealt.

Extended Lash

Prerequisite: coagulation lash cantrip When you cast coagulation lash, the range is now 30 ft.