Ring of Whispers is a reward from Sliske's Endgame. When equipped, it provides a +3 invisible bonus to gathering skills. The invisible boost stacks with familiar invisible boosts such as Lava titan.
Wearing the ring along with the Necklace of Shadows and the Combined Catalyst fragment allows players to occasionally find Manifested knowledge when training which will offer experience in the skill they were training when it appeared.
This item can be reclaimed from Relomia, Emissary of Sliske, in Draynor Village.