Chains of The Grave

You call unto the Bound God, heaving blacked ethereal chains at an enemy within 30ft. Make a melee spell attack against a creature within 30ft. On a hit, the target takes 3d6 necrotic damage, and must make a Strength saving throw or be restrained for the spells duration. Until the spell ends, you can make chains tighten causing 1d6 necrotic damage again on each of your turns as an action. In addition you can use a bonus action during the spells duration to pull the enemy 10ft towards you.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.