Emerald Scarabs
Wondrous item, rare
These scarabs come in pairs, carved from a piece of emerald‑green crystal grown from the Emerald Tablets. After speaking a command word, you can place one of the scarabs down and activate it as a clairaudient sensor, picking up all sounds made within 30 feet of it. These sounds will emit from the other scarab of the pair so long as the two remain no more than 1 mile apart.
This item is not without its dangers as sound‑based magic can also travel through the magical link. Any sound-based magic within range to be picked up by an emerald scarab (such as thunderwave or a harpy’s luring song) can affect those close enough to the partnered scarab to hear it.