Create Whirlwind (Elemental Spell)

A 5-foot-radius, 30-foot-tall cylinder of swirling air magically forms on a point you can see within 120 feet of you. The whirlwind lasts as long as you maintain concentration, for up to 5 minutes. Any creature but you that enters the whirlwind must succeed on a DC 18 Strength saving throw or be restrained by it. You can move the whirlwind up to 30 feet as an action, and creatures restrained by the whirlwind move with it. The whirlwind ends if you lose sight of it. A creature can use its action to free a creature restrained by the whirlwind, including itself, by succeeding on a DC 18 Strength check. If the check succeeds, the creature is no longer restrained and moves to the nearest space outside the whirlwind.