Earth, Wind, and Fire

You channel the natural elements of earth, wind, and fire into a powerful, multilayered attack. You create a 30 foot radius cylinder within range that is 50 feet tall.

Creatures within the cylinder must make a Strength saving throw, taking 3d6 bludgeoning damage on a failed save, or half as much damage on a successful save. Those that failed the saving throw also have their speed reduced to 0 until the end of your next turn, as they are trapped within the earth.

After that, creatures within the cylinder must make a Dexterity saving throw, taking 3d6 slashing damage on a failed save, or half as much damage on a successful save. Those that failed the Strength saving throw fail the Dexterity saving throw automatically, as they writhe in pain from the whiplash.

After that, creatures within the cylinder must make a Constitution saving throw, taking 3d6 fire damage on a failed save, or half as much damage on a successful save. Those that failed the Dexterity saving throw take an additional 3d6 cold damage, as the frigid air makes their burns grow in intensity.

Immediately after casting this spell, all surfaces and air that were within the cylinder, become magical difficult terrain for 1 hour.

When you cast this spell using a spell slot of 6th level or higher, you add an additional 1d6 damage to all damage rolls of this spell for each slot level above 5th.