Bone Blast

You summon bones from deep within one of the nine circles of hell, forcefully expelling them in a 100ft long and 5ft wide blast originating from your position. Each creature or object in the blast must make a Strength saving throw or take 8d8 bludgeoning damage and be knocked prone. On a success, a creature takes half as much damage and isn't knocked prone. Non-magical objects and structures automatically fail this saving throw and take the maximum possible damage. The Bone Blast is stopped prematurely by obstacles it is unable to destroy, as well as any creature of size Huge or larger that passes the saving throw.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the bludgeoning damage increases by 1d8 for each slot level above 5th. Additionally, when you cast this spell using a spell slot of 7th or higher, a creature that succeeds on the saving throw needs to be of size Gargantuan to stop the blast.