Cullen's Crushing Downdraught

Powerful, torrential wind bares down in a 30-foot-radius, 60-foot-high cylinder, centered on a point you can see within range. The point must be on the ground. Until the spell ends, that area is difficult terrain, and any creature that starts its turn there or enters the spell's area for the first time on a turn must succeed on a Strength saving throw taking 6d6 bludgeoning damage and be pushed 15 feet away from the center on a failed save, or half as much damage on a successful one. Flying creatures affected by the spell are also knocked prone on a failed save. Ranged weapon attacks that pass through the cylinder or that are made against targets within it have disadvantage on their attack rolls.