Oath of The Storm Slayer

And the Lightning Strikes

Channel Divinity: Storm King Warfare

At level 3, You can surround yourself with a thundering Aura. For 1 minute, you can swing your blade at a target within 30 ft, causing the Aura to channel into your blade and releasing it at the target. Roll to attack the target. On a hit, the target Takes 1d6 thunder damage, and can't take reactions until the start of their next turn. This attack must be the first action you take on your turn, and using this action ends your turn.

Aura of The Stormterror

At level 7, You and allies within 15 ft of you gain resistance to thunder and lightning damage.

Lightning Dragon's Roar

At level 15, You can exhale lightning in a 30 by 5 ft line, dealing 3d8 lightning damage. Those caught within the lightning must roll a dex save, taking half damage on a success or full damage on a fail. You can use this ability twice per long rest.

Storm King's Smite

At level 20, You can switch between Lightning, Thunder, or Radiant Damage when using Divine Smite. Switching this Damage takes a Bonus Action and a 3rd level Spell Slot, and lasts for 1 minute.