Aeromandias

Magic Resistance. Aeromandias has advantage on saving throws against spells and other magical effects.

Spellcasting. Aeromandias is an 20th-level spellcaster. His spellcasting ability is Wisdom(spell save DC 17, +9 to hit with spell attacks). Aeromandias can cast lightning bolt and misty step at will and has the following spells prepared:

Cantrips (at will): lightning lure, gust, thunderclap, shocking grasp

1st level (4 slots): witch bolt, thunderwave, warding wind, chromatic orb

2nd level (3 slots): dust devil, shatter, gust of wind

3rd level (3 slots): wind wall, lightning arrow, call lightning

4th level (3 slots): banishment, storm sphere, conjure minor elementals

5th level (3 slots): cloudkill, conjure elemental, control winds

6th level (2 slot): investiture of wind

7th level (2 slot): whirlwind

8th level (1 slot): control weather

9th level (1 slot): storm of vengeance

Dagger. Melee or Ranged Weapon Attack: +6 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 4 (1d4 + 2) piercing damage.

Aeromandias can take 3 legendary actions, choosing from the options below. Only one legendary action can be taken at a time and only at the end of another creatures turn. Aeromandias regains spent legendary actions at the start of his turn.

Move. Aeromandias moves up to his speed.

Lightning Strike (Costs 2 Actions). Aeromandias can cause a bolt of lightning to strike a point on the ground anywhere under his storm. Each creature within 5 feet of that point must make a DC 20 Dexterity saving throw, taking 16 (3d10) lightning damage on a failed save, or half as much damage on a successful one.

Screaming Gale (Costs 3 Actions). Aeromandias releases a blast of thunder and wind in a line that is 1 mile long and 20 feet wide. Objects in that area take 22 (4d10) thunder damage. Each creature there must succeed on a DC 21 Dexterity saving throw or take 22 (4d10) thunder damage and be flung up to 60 feet in a direction away from the line. If a thrown target collides with an immovable object, such as a wall or floor, the target takes 3 (1d6) bludgeoning damage for every 10 feet it was thrown before impact. If the target would collide with another creature instead, that other creature must succeed on a DC 19 Dexterity saving throw or take the same damage and be knocked prone.