Earth Rend

You connect to the Elemental Power of the Earth around you and draw power from it, then Channel that power back out into the ground around you. A crack in the Earth projects from you in a line 30 feet long, 5 feet wide and 20 feet deep in a direction you choose leading away from you. Each creature in the Line must succeed a DEX Saving Throw or fall into the fissure and take (2d6)+SM Bludgeoning damage and fall Prone on a Failed save, on a Success creatures avoid the fissure and take no damage but are still knocked Prone. 

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by (1d8) for each slot level above 2nd.