Earth Spike

You cause the earth to erupt into jagged spikes 5 feet in height in a 30 foot long, 5 foot wide line. Each creature in that line must succeed on a Strength saving throw or take 3d8 bludgeoning damage and be knocked prone. On a successful save, a creature takes half damage and is not knocked prone.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 and the length of the line increases by 10 feet for each slot level above 2nd.