Conspirator’s Whistle

Wondrous item, uncommon (requires attunement)

Price: 200-800 gp | low sentimentality

This unassuming silver whistle is small and easy to hide with a sleight of hand. Once a day, you can designate up to 3 creatures as your conspirators. Until dawn the next day, your conspirators are the only creatures who can hear the whistle, other than yourself. The whistle’s sound has a range of 500 feet and all conspirators within range hear the whistle clearly at a moderate volume regardless of their distance from the whistle. Only magical effects block the whistle’s sound. The whistle is blessed by a cleric of Phenax, god of deception, and Phenax is the only god whose divine intervention can enable creatures other than your conspirators to hear the whistle.

Paid

You can designate up to 8 creatures as your conspirators, instead of 3.

Overpaid

The whistle’s sound has a range of 1,000 feet instead of 500 feet.

Source: The Gray Merchant of Asphodel