Talon's Rain of Bones

You conjure a cloud of negative energy that rains massive bones down in a 60-foot radius, 100-foot high cylinder centered on a point on the ground within range. Each creature in the area must make a Dexterity saving throw, taking 5d10 bludgeoning and 5d10 necrotic damage on a failed save as it gets pummeled by the bones. On a successful save, a creature takes half damage.

The bones turn the ground into difficult terrain until they crumble to dust at the end of your next turn. Any spell cast using these conjured bones as a material component automatically fails.