Boon of the Stormborn

You gain the following benefits.

Ability Score Increase. Increase one ability score of your choice by 1, to a maximum of 30.

Immunity to the Storm. You gain immunity to lightning and thunder damage, standing unshaken amid the raging storm and untouched by its might.

Voice of Thunder. You can also cast Thunderwave (save DC 15) at will, without using a spell slot or any components.