Breach

You reach out your hand and touch a wall or similar barrier up to a foot thick, made out of nonmagical material, and channel force into it. You pulverize an 8 foot by 8 foot square of the wall, making it crumble toward the side opposite of where the magic was casted.

At higher levels: For each level above 3rd, increase the maximum thickness of the wall by a single foot and the square's length by a foot on both sides.