Twin Dragon Bow (5e Equipment)

Weapon (longbow), rare

You have a +1 bonus to attack and damage rolls with this magic weapon.
While you are holding this bow, you can use your action to shoot a spectral dragon. Each creature you choose in a line 300 feet long and 5 feet wide must make a DC 15 Constitution saving throw, taking 5d10 piercing damage on a failed save or half as much damage on a success. You then fall unconscious for 1 minute.