Voldrok's Mighty Slash

The caster slashes in the air and a large wave of energy comes out of the blade. The slash is a 15 ft long horizontal line that moves out 30 ft in the direction they casted it towards. A creature must make a dexterity saving throw or take 3d10 slashing damage and be knocked prone. On a successful save they take half damage and do not fall prone. This spell destroys anything made of wood that is not being worn or carried.

This spell does and additional 1d10 damage for every spell above 3rd level.