Tempest's Wrath

You have been blessed by an Elder Tempest. As a boon to the blessing, twice a long rest, you can call up on the powers of the Tempest and as a bonus action on any melee or ranged attack that hits, you can add an additional 1d8 damage.  You must roll a d4 for the type of damage the target will receive. 

1- Force Damage

2- Lightning Damage

3- Cold Damage

4- Thunder Damage

This ability will reset after a long rest.