Binding Smite

A spectral chain lashes the target.  The creature hit by this attack takes 3d8 Bludgeoning damage. 

A Large or smaller creature is forced to make a Strength saving throw.  On a failed save, the creature is Restrained with an unbreakable spectral chain. The target is tethered and cannot willingly move more than half of its movement away from the caster.  It cannot teleport or fly.   

The target must repeat the save on each of its next turns until it succeeds, or the caster loses concentration. 

Using a Higher-Level Spell Slot. For every level above 2, the spell damage increases by 1d8.