Targeting a point on the ground you can see, you cause a cyclone made of whipping flames to fill a 10-foot-radius, 30-foot-high cylinder. Creatures that are inside the spell when you cast it or enter it for the first time on a turn must make a Strength saving throw. On a failed saving throw, it takes 3d6 fire damage and is flung 15 feet upwards and lands 15 feet in a randomly determined horizontal direction. On a successful save, the creature takes half as much damage and is not flung. When a creature is not entirely inside the cyclone's radius but within 30 feet of its center at the start of its turn, it still feels the intense draw of the raging cyclone, and must spend 2 feet (or 3 feet if it is flying) of movement for every 1 foot it moves away from the cyclone. For the duration of the spell, you can spend an action to move the cyclone up to 30 feet in any direction along the ground.