This unique and deadly weapon takes the form of a sleek and slender arrow, approximately 3 feet in length. It is made of a mysterious, lightweight material that glimmers with a metallic sheen. When wielded by a skilled archer, it exhibits extraordinary properties.

Arrow of Controlled Flight: When fired from a suitable ranged weapon such as a bow or crossbow, the Whistling Arrow can be controlled by the archer with precision. As a bonus action, the archer can mentally command the arrow's flight path within a range of up to 500 feet. This allows the arrow to make sudden turns, change directions, and even curve around obstacles to reach its intended target. The archer must have a clear line of sight to the arrow in order to maintain control over its flight.

Whistle of the Wind: As the Whistling Arrow flies through the air, it emits a haunting whistle that can strike fear into the hearts of enemies. When the arrow is fired, all creatures within a 30-foot radius of its flight path must succeed on a Wisdom saving throw (DC determined by the archer's proficiency bonus + Dexterity modifier) or become frightened for 1 minute. The frightened creature can repeat the saving throw at the end of each of its turns, ending the effect on a success.

Pinpoint Accuracy: The Whistling Arrow benefits from the archer's exceptional marksmanship. When making an attack roll with the arrow, the archer can add their Dexterity modifier twice instead of once to the attack roll.

Return to Hand: After the arrow reaches its target or completes its controlled flight, it magically returns to the archer's hand at the end of the turn. This allows the archer to retrieve and reuse the arrow without the need for ammunition or additional arrows.

Notes: Ranger