Tremor

You unleash a small, localized tremor in a 10-foot area within 30 feet. Each creature in the area takes (scaling d8)[bludgeoning|options:area-damage] damage with a fortitude save against your class DC. A creature that critically fails is knocked Prone. Earth and stone in the area is difficult terrain until the start of your next turn.

Level (+2) The damage increases by 1d8.