Vanghul

Special Trait Name. Abrasive

Spellcasting. The Vanghul is a 10-level spellcaster. Its spellcasting ability is Wisdom (17#, +8 to hit with spell attacks). The Vanghul has following Thunderlord spells prepared:
Cantrips (at will): Thunderclap, Thunderwave,
1st level (2): Lightnigbolt, Thunderstep

2nd level (1) Lightning boomerang*

3rd level (2) Lightning  thrust*, Thunder Image*

*Lightning Boom. Hits enemy and steals 2d8 +5 hp and stuns.

*Lightning thrust: Charged with Lighting you thrust towards the enemy d12 + 8

*Thunder image: Creates a lightning creature I control at will for one action d8 + 8

Action Name.

Action Melee Attack. Thunder  sword, self or throw 60 ft, Hit d10+ 3, Thunder (Generates disadvantage roll for enemy)

Action Ranged Attack. Object throw, 100ft range, d20 +3, 

Extra spell

Attacks that are immune to him will bounce back with half damage

Shockwave (2). Once per battle summon lightning underground up to 60 ft in radius causing the ground to elevate and cause a massive electrical sphere. Enemies take 2d12+5 damage.

Enter the description for how mythic actions work for your monster here.

Mythic Action Name (2). Thunderstorm, 2 spell slots, creates a storm that targets enemies with thunder and lightning.