Grasping fingers of earth and clay rise up in an area to snatch and grab at nearby creatures. Each creature in the area when you cast the spell, and each creature that ends it's turn in the area during the spell's duration, must attempt a Strength saving throw against your spell save DC.   On a failed save, the creature suffers 2d6 bludgeoning damage and is grabbed by the grasping clay fingers. On a success, the creature suffers half damage and is not grabbed. If the creature critically fails, it is restrained rather than grabbed.   For each round the spell is maintained, you can use your action to cause the clay fingers to constrict, causing 1d6 bludgeoing damage to grabbed creatures, or 2d6 bludgeoning damage to restrained creatures.   A creature can attempt to Escape, rolling against your spell save DC.