Wall of Fire

Create an opaque wall of fire on a solid surface within range, up to 60 ft. long, 20 ft. high, and 1 ft. thick, or a ring up to 20 ft. in diameter. Creatures in its area make a DEX save, taking 5d8 fire damage on a failed save, or half on a success. One side deals 5d8 fire damage to creatures that end within 10 ft. of it or enter it.