Burning Trail

The target's feet glow with a magical flame that lingers and grows on the ground where they walk, creating a line of blazing fire as they move. The first time the target Strides during the spell's duration, they leave behind a trail made of magical fire that fills up each space they occupied during that Stride. This fire is 5 feet high. Creatures on either side of the trail are Concealed from creatures on the opposite side. Any creature that enters or starts its turn in the trail's area takes 2d10 fire damage.