Small, stone hands rise up from the ground beneath a Large or smaller creature you can see within range. The target must succeed on a Dexterity saving throw or be grappled by the hands.    As a bonus action on your turn, you can move the hands up to 20 feet along the ground. If the hands are grappling a creature, the grappled creature is dragged along and takes bludgeoning damage equal to 1d6 + your spellcasting ability modifier. If the hands aren’t grappling a creature and stop within 5 feet of a Large or smaller creature, that creature must succeed on a Dexterity saving throw or be grappled.    A creature grappled by the hands can use its action to make a Strength check against your spell save DC. On a success, it is no longer grappled.