Air Elemental Lord

Air Form. The elemental can enter a hostile creature's space and stop there. It can move through a space as narrow as 1 inch wide without squeezing.

Air Mastery. Creatures of size Large or smaller have disadvantage on attacks made against the elemental while flying

Multiattack. The elemental makes two slam attacks.

Slam. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 24 (2d8 + 15) bludgeoning damage.

Whirlwind (Recharge 4–6). Each creature in the elemental's space must make a DC 20 Strength saving throw. On a failure, a target takes 25 (3d8 + 12) bludgeoning damage and is flung up 20 feet away from the elemental in a random direction and knocked prone. If a thrown target strikes an object, such as a wall or floor, the target takes 3 (1d6) bludgeoning damage for every 10 feet it was thrown. If the target is thrown at another creature, that creature must succeed on a DC 20 Dexterity saving throw or take the same damage and be knocked prone.

If the saving throw is successful, the target takes half the bludgeoning damage and isn't flung away or knocked prone.

The Air Elemental Lord can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The elemental regains spent legendary actions at the start of its turn.

Wind Wall. A wall of strong wind rises from the ground at a point you choose within range. You can make the wall up to 50 feet long, 15 feet high, and 1 foot thick. You can shape the wall in any way you choose so long as it makes one continuous path along the ground. The wall lasts for the duration.

When the wall appears, each creature within its area must make a Strength saving throw. A creature takes 3d8 bludgeoning damage on a failed save, or half as much damage on a successful one.

The strong wind keeps fog, smoke, and other gases at bay. Small or smaller flying creatures or objects can't pass through the wall. Loose, lightweight materials brought into the wall fly upward. Arrows, bolts, and other ordinary projectiles launched at targets behind the wall are deflected upward and automatically miss. (Boulders hurled by giants or siege engines, and similar projectiles, are unaffected.) Creatures in gaseous form can't pass through it.

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Cyclone. The Elemental Lord spins, each creature within 10 feet must make a DC 12 Strength check or get thrown 15 feet and knocked prone.

Tornado (Costs 2 Actions). The elemental creates a tornado at a point of its choosing within 120 feet from it. The targeted creature must make a DC 18 Dexterity check or get thrown 50 feet in the air