Oathbow
Requires Attunement
When you nock an arrow on this bow, it whispers in Elvish, "Swift defeat to my Enemies." When you use this weapon to make a Ranged Attack, you can, as a Command phrase, say, "Swift death to you who have wronged me." The target of your Attack becomes your Sworn Enemy until it dies or until dawn seven days later. You can have only one such Sworn Enemy at a time. When your Sworn Enemy dies, you can choose a new one after the next long rest.
When you make a Ranged Attack roll with this weapon against your Sworn Enemy, you have advantage on the roll. In addition, your target gains no benefit from cover, other than total cover, and you suffer no disadvantage due to Long Range. Each round of attacking your Sworn Enemy, you increase the damage inflicted on a hit by 1d6 to a maximum of 3d6s. Damage inflicted by your arrows from this bow against your Sworn Enemy considered magical.
While your Sworn Enemy lives, you have disadvantage on Attack rolls with all other Weapons.
Ammunition: You can use a weapon that has the Ammunition property to make a Ranged Attack only if you have Ammunition to fire from the weapon. Each time you Attack with the weapon, you expend one piece of Ammunition. Drawing the Ammunition from a quiver, case, or other container is part of the Attack. At the end of the battle, you can recover half your expended Ammunition by taking a minute to Search the Battlefield.