Amulet of Storms

This magic amulet houses the soul of a Blue Dragon. Within 6 miles of the amulet, there is a large chance for a thunderstorm to appear and it is always raining.

You have Immunity to Lightning and Thunder Damage while wearing this magic amulet.

Using a charge of the amulet, you can cast the Lightning Bolt Spell as a Bonus Action. The amulet has 3 charges. All charges are reset when you take a Long Rest.