Colossal Crush

You choose a point you can see within range that is on a horizontal surface. You then summon a  colossal-sized creature or object above that point up to 60 feet (minimum of 20 feet) that falls to the ground. The nature of the colossus you summon can be anything that could reasonably attain that size (i.e: a whale, a house, a giant, or a really big anvil). Each creature in a 25 ft. square underneath the colossus must make a Dexterity saving throw. If the spell is centered on a creature, it has disadvantage on the saving throw. On a failed save, a creature takes 1d10 bludgeoning damage for every 10 feet the colossus fell and falls prone. If that creature is in the air, it also gets pushed to the ground. On a successful save, a creature takes only half the damage, moves to the nearest unoccupied space outside the affected area, and doesn't get knocked prone or pushed to the ground. The spell automatically fails if the area cannot fully accommodate the colossus's size. The size of the colossus can be altered to allow accommodation to a minimum of a 10 foot square space. After the colossus falls to the ground, it vanishes at the end of your turn.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the maximum height for which you can summon the gargantuan increases by 10 feet.