Cloak of the Tempest

Dark clouds of the Storm Lord gather around you, draping over your body and gear in a slipstream of thunder and lightning. The electric rage of Talos surges through you and you gain +1d6 lightning damage added to your weapon attacks for the duration of the spell. If you dealt lightning damage during your turn, at the end of your turn any creature within 5ft must make a DC15 constitution saving throw. On a failed throw the creature is pushed backwards away from you 5ft and takes 1d6 thunder damage. (The knockback effect does not trigger opportunity attacks). On a successful throw the target is not knocked backwards and takes half the damage.

Additionally, the energy of the lightning and lift of the storm clouds grants you remarkable swiftness, adding +10 to your movement speed. When a creature hits you with a melee attack, they take 1d6 lightning damage and must make a DC15 constitution saving throw. On a successful throw the enemy takes half damage and no further effect takes place. On a failed throw the enemy is pushed backwards 5ft and takes an additional 1d6 thunder damage. 

When the spell ends you must make a DC15 constitution saving throw. On a failed throw you take 2d6 thunder damage and the wind is knocked out of you. The next melee attack made against you has advantage. On a successful throw you take half the damage and maintain your composure. 

At Higher Levels: For each level cast above 2nd, up to 5th level, all damage is increased by 1d6.