Bow of Storms

Weapon (longbow), legendary (requires attunement by a ranger)

This +3 longbow is made of fine yew with intricate carvings of storms carved into the wood.

Radiates: Evocation magic.

Power: Your arrows deal an extra 1d8 lightning damage, or 2d8 in coast or mountain terrain.

Power: Once per day, you may use a bonus action to cause the bow to radiate with arcing electrical light. For the next minute, you have advantage on your attack rolls and the bow does an extra 1d8 lightning damage (2d8 in any terrain, or 3d8 in coast or mountain terrain).

Limit: You must have coast or mountain as a favored terrain to use this weapon.