Ensnaring Smite

The next time you hit a creature with a melee weapon attack during this spell’s duration, your weapon crackles with a dark energy that wraps around the target and the attack deals an extra 3d8 necrotic damage to the target. Additionally, the target must succeed on a Strength saving throw or be restrained until the spell ends.

A creature restrained by this spell makes another Strength saving throw at the end of each of its turns. On a successful save, it is no longer restrained.