Arboreal Impact

You point at a planted seed or small sapling within range. It instantly and violently grows to a great 60 foot tall tree, with a trunk diameter of 5 feet. Each creature within a 15 foot square centered on the tree must make Stength saving throw. A creature takes 3d10 bludgeoning damage and is pushed back 10 feet on a failed save. On a successful save, it takes half as much damage and is not pushed back. A creature standing in the space where the trunk emerges automatically fails the save. 

Any structures that would halt the tree's growth take double damage from this spell. 

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d10 for each slot level above 3rd.