Thunderbrand Elemental Stone Call

You throw the lodestone into the air, trailing stone dust behind it to create a cone of stones laced through with elemental power that shoot forward and smash themselves against your quarry. Each creature in a 60-foot cone must succeed on a Dexterity saving throw. A creature takes 3d8 damage on a failed save, or half as much damage on a successful one. The damage type is dependent on the shape of the caster's will.

Possible damage types: cold, fire, lightning, acid or necrotic