Envenomed Earth

You fill the air with a chaotic vortex of venom-drenched stones in a cube 5 feet on each side, centered on a point you choose within range. A creature takes 4d4 bludgeoning damage when it enters the spell’s area for the first time on a turn or starts its turn there and makes a Constitution saving throw. Upon successful save the creature takes half damage. If the creature fails the save, it sustains full damage and is branded with the Stoneblight Curse for 3 turns. 

While the target is afflicted with the Stoneblight Curse their movement is reduced by half. They gain resistance to piercing and slashing damage. The target makes a Dexterity saving throw at the start of every turn while afflicted. Upon failure, it cannot move for the turn and is magically encased in stone and smothered for 3d4 bludgeoning and 1d4 poison damage. This save can be failed twice, upon which the curse ends.

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