To obtain the Whisper of the Worm, one must complete a secret mission called The Whisper. This mission is only available from Friday to Monday, and can only be accessed by entering an anomaly that appears in certain patrol areas on Io by killing specific Taken lieutenants that appear during the Taken Blight Public Event. These lieutenants are called Drevis, Aspect of Darkness, Urzok, Aspect of Hate, and Ta'aurc, Aspect of War. Upon entering the anomaly, the player is taken to the Grove of Ulan-Tan Lost Sector location and will have to navigate through mazes and dark caverns as well as fight through hordes of Taken that spawn through numerous blights, which will wind up in a large boss encounter featuring the lieutenants from before. This mission runs on a timer that is set to approximately twenty minutes, and given the sheer amount of enemies as well as the toughness of the bosses, it is highly recommended to be at an incredibly high Power level and bring a full Fireteam that matches or surpasses the activity's level. If the mission is completed before the timer runs out, the player is finally awarded with the Whisper of the Worm.