Tharin´s Soulbinding Chains

Spectral chains burst from the ground and attempt to ensnare the soul of a creature you can see within range. The target must succeed on a Constitution saving throw or be restrained for the duration. While restrained by these chains, the target takes 2d10 necrotic damage at the start of each of its turns. And you heal for half of that damage, The creature can use its action to make another Constitution saving throw, ending the effect on itself on a success.

Using a Higher-Level Spell Slot. You can target one additional creature for each spell slot level above 1.