Bow of Shadows

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

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

Radiates: Evocation magic.

Power: Your arrows deal an extra 1d8 necrotic damage, or 2d8 in forest or underground terrain.

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

Limit: You must have forest or underground as a favored terrain to use this weapon.