Curse of the Shadow

You partially call the power of the Negative Planes to draw energy from nearby creatures. The ground in range becomes difficult terrain for your enemies, and they have to make a Constitution save or take 6d12 Necrotic damage. If a creature fails the saving throw, you regain hit points equal to the damage dealt, and you can share the hit points with creatures within range,  if a creature succeeds in the saving throw it recieves half the damage and the hit points arent drained

In each with your turns, you can use your action to activate this effect again.

At higher levels: If you cast this spell with a 9th level spell slot, the duration of the spell increases 3 rounds.