Bone Garden

You extend your hand towards an area you can see within range, calling the aid of the dead as skeletal arms and hands begin to crawl their way from beneath the ground in a 20 foot radius centered on a point. For the duration, the area is considered difficult terrain. When a creature starts its turn or moves into the area for the first time, it must succeed on a Dexterity saving throw or be grappled by the hands. At the start of a grappled creatures turn, it can make a Strength (Athletics) check contested by your spell save DC to break the grapple. A creature can use it's action to help free a grappled target. This spell has no effect on undead.