Whisper of the Worm is an Exotic Sniper Rifle introduced in Destiny 2 with a recent update on July 17th, 2018. It is the successor to the Black Spindle.
Destiny 2 Whisper quest is a bonus mission quietly added to the game as part of the July 2018 update.
Somewhat of a remake of the famed Black Spindle quest from the original Destiny, the mission is accessed through specific steps in a seemingly ordinary activity. From there, you must complete it within a strict time limit.
The reward? An Exotic sniper rifle named Whisper of the Worm, which is essentially the Black Spindle, making it one of the game’s most useful weapons.