Create a wall of fire (up to 60 ft long, 20 ft high, 1 ft thick) or a ringed wall (20 ft in diameter, 20 ft high, 1 ft thick) for 1 minute (Concentration). When the wall appears, each creature within it makes a DEX save or takes 5d8 Fire damage (half on success). A creature that ends its turn within 10 feet of the wall or inside it takes 5d8 Fire damage. Higher Slot: +1d8 per slot level above 4.

Material: a small piece of phosphorus