Earthquake

The ground heaves violently in a 10-meter radius centered on a point you can see. All creatures in the area take INT Die + INT Bonus Crushing damage. The area becomes Difficult Terrain permanently as the earth cracks and buckles. Structures and objects in contact with the ground take double damage. If cast on a surface above a hollow space (cave ceiling, upper floor), the surface collapses. You may spend a Bonus Action before the end of your next turn to trigger an aftershock - all creatures in the area take INT Die + INT Bonus Crushing damage and must succeed on a STR Save against your INT Check or be knocked Prone.