Yamato

Evocation Casting Time: 1 action Range: 60 feet (20-foot radius) Components: V, S, M (a piece of charcoal) Duration: Concentration, up to 1 minute You summon a massive firestorm at a point within range, engulfing a 20-foot radius in flames. Each enemy creature in the area must make a Dexterity saving throw, taking 6d10 fire damage on a failed save, or half as much on a successful one. The fire spreads to any flammable objects in the area. Allies standing in the radius of the flames suffer no damage and get healed by 4d8 instead.