Storm Kitsune, ArashiKitsu

Storm Tailed Magic:

You learn the Shocking Grasp cantrip. You learn the spell Thunderwave and may use it a number of times equal to your tails

Shapeshifter: 

You may cast any spell that does thunder or lightning damage

Lucky Fox: 

You may spend tailed magic to reroll a failed check, save, or attack roll made by you