Arges' Army Crushing Sword

Until the end of the round you imbue a weapon with a powerful aura capable of crushing your enemies. While your weapon is imbued in this way you don't make attack rolls, instead the sword aura grows and crushes anything in a line, which is 10 feet wide and 60 feet long. Those hit by the aura must make a Strength saving throw. On a failed save a creature takes your weapon damage die force damage, and is knocked prone. On a successful save a target takes half damage and is not prone.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by your weapon damage die for every two slot levels above 3rd.