Crumble

You bring the forces of erosion to bear on a Large or smaller object not made primarily of metal, dealing necrotic damage to the target.

Alternatively you can use this spell to target a Large or smaller construct not made primarily of metal. It must succeed on a Constitution saving throw, taking the full necrotic damage on a failed save, or half as much damage on a successful one.

The larger an object’s size, the more damage it takes, as seen in this chart:

*only possible when casting the spell at a higher level

At Higher Levels. When you cast this spell using a spell slot of 5th-7th level, the maximum size of the target is Huge. When you cast this spell using a spell slot of 8th level or higher, the maximum size of the target is Gargantuan.