- Despite showing it has one stack, this item never runs out.
- The Greevil form and the abilities depend on the Greevil the user has equipped.
- When toggled on, the hero gets hidden and moved along with the Greevil.
- When toggled off, the Greevil gets hidden and moved along with the hero.
- Plays a different sound when toggling off.
- The whistle part of the sounds are audible to the user only.