You place the Whistleleaf on your tongue, and press it against the roof of your mouth for a minute, imbuing it with magic. The leaf merges with your tongue, and for 24 hours you gain the ability to make loud and precise whistles, as long as you are able to part your lips and breathe. The whistles can be used to create a range of clear commands, and communicate a musical language native to the planes of Caan. Some common whistles include: "Help me", "I'm ready", "Come here", "Watch out", "Flank left", "Flank right", and "Flee". You can whistle as low or loud as you prefer, to a maximum audible distance of 300ft.