Arrow of the Tempest

Damage rolls made with this ammunition deal thunder damage instead of piercing damage.

Alternatively, while outdoors, you can use a bow to fire this arrow into the sky as an action, causing storm clouds to rapidly form. After 12 seconds, these clouds release a torrential downpour of rain lasting for 1d4*10 minutes. The arrow is consumed when used in this way. At any time during the storm’s duration, you can cause a target you can see within 150 feet to be struck by a bolt of lightning, dealing 2d6 lightning damage. This effect can be invoked once per arrow expended.