Aelurus, The Thunderweaver

Angelic Weapons. Aelurus' weapon attacks are magical. When Aelurus hits with any weapon, the weapon deals an extra 22 (4d8) radiant damage.

Celestial Nature. Aelurus' attacks are considered magical. They cannot be put to sleep and is immune to effects that would alter its form against its will.

Divine Awareness. Aelurus knows when he hears a lie.

Flyby. Aelurus doesn't provoke an opportunity attack when flying out of an enemy's reach.

Heaven’s Fury. When Aelurus drops below half its hit points, all of its attacks deal an additional 8 (2d6) Radiant damage until it heals back to full hit points, or it dies.

Spellcasting. Aelurus is a 7th level spellcaster. Their spellcasting ability is Charisma (spell save DC 20, +12 to hit with spell attacks). Aelurus has following spells prepared:
At will: thunderwave, gust of wind

3/day: call lightning, wind wall

1/day: control winds, chain lightning

Multiattack. Aelurus can make three Lightning Spear attacks, or two Lightning Spear attacks and one Angelic Wings attack.

Lightning Spear. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) piercing damage. On a hit, the target is also hit with an additional 11 (2d8) lightning damage.

Angelic Wings. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) radiant damage.

Thunderclap [recharge 5-6]. Aelurus emits a deafening thunderclap audible within 300 feet of it. Each creature within a 20 ft. radius of him must make a DC 20 Constitution saving throw, taking 33 (6d10) thunder damage on a failed save, or half as much damage on a successful one. Additionally, creatures that fail the saving throw are deafened for 1 minute. Creatures that fail consecutive saves against Aelurus' Thunderclap are unable to make reactions or use bonus actions.

Aelurus 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. Aelurus regains spent legendary actions at the start of its turn.

Angelic Wings. Aelurus can make one Angelic Wing Slap attack.

Lightning Bolt (2 actions). Aelurus casts lightning bolt. A stroke of lightning forming a line 100 feet long and 5 feet wide blasts outwards in a direction of Aelurus' choosing. Each creature in the line must make a DC 20 Dexterity saving throw. A creature takes 10d6 lightning damage on a failed save, or half as much damage on a successful one.

The lightning ignites flammable objects in the area that aren't being worn or carried.

Thunderous Presence (3 actions). Aelurus unleashes a wave of thunderous energy in a 30-foot radius around itself. Each creature in that area must make a DC 20 Strength saving throw. On a failed save, a creature takes 22 (4d10) thunder damage and is pushed 10 feet away from Aelurus. On a successful save, the creature takes half as much damage and isn't pushed.