Call to the Hungry Ghosts

Skeleton hands emerge from the ground in a 15-foot radius cylinder centered on a point you can see within range. Each creature in the area must make a Dexterity saving throw. On a failed save the creature takes 5d8 bludgeoning damage. On a sucessful save the creature takes half damage and isn't otherwise affected.

If the creature is still in the area at the start of your next turn and it failed the first save, it must make a Constitution saving throw. If the creature failes this second caving throw it becomes vulnerable to all damage until the end of your next turn.