Earthen Tether

A snaking tether of darkness wraps around a creature within range, forcing a Constitution saving throw. On a failed save the creature is cursed to decay. When such a creature begins its turn in contact with natural, unworked stone or earth, it takes 4d4 necrotic damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d4 for every slot above 2nd.