As an action, summon 1d6 portals (5-foot diameter) on the floor within a 45-foot radius. Each portal emits a vertical beam of intense heat, extending until it hits a solid surface. Creatures in the beam's path must succeed on a Dexterity saving throw (DC = 10 + your spellcasting modifier) or take 3d4 fire damage. The beams are impassable and disappear at the end of your turn.