The Whisper is a secret quest found on Io. A completion of this Quest rewards the player with the Whisper of the Worm Exotic Sniper Rifle. The quest can be triggered during any Public Event in Lost Oasis. While the event is active, you have to find and kill one of three bosses: Ta'aurc, Aspect of War, Drevis, Aspect of Darkness or Urzok, Aspect of Hate. Doing so will open a portal near Grove of Ulan-Tan that starts the quest.
Upon entering the portal in the Lost Oasis, the fireteam will start in the Lost Sector Grove of Ulan-Tan. The quest is all about speed and precision, since the timer is set to 20 minutes before the players are returned to orbit. There are lots of jumping puzzles with moving objects and Taken traps on the walls and the floor, which can launch a player off the platforms and force them to start over. After the jumping sections comes a large room with several Taken Blights where all enemies have to be killed in order to continue forward. Keep in mind that these enemies have elemental Absorption shields, which can easily be taken down with grenades, melee abilities, Supers or Energy weapons with corresponding elements. This process repeats in the second and third room, with the latter featuring a large pit that the fireteam need to jump down. This will lead them to the final room where three bosses will appear among many other Taken enemies. Killing all three bosses will finish the mission and reward the participating Guardians with the Whisper of the Worm.
After the completion of the quest, a Heroic version will be accessible from the map of Io, but only when the original mission can be started. This mission have to be completed three times over the course of three weeks to gain the Catalyst, to upgrade it and to unlock the Exotic Jumpship A Thousand Wings. The Catalyst is unlocked by opening chests hidden throughout the mission. The ship is acquired by completing the Heroic quest three times with the Void, Arc and Solar Singe modifiers.
List of appearances