Flute of the Depths

Wondrous item, instrument, very rare

This crusty alabaster flute smells of salt and plays an uneasy tone. The origins of the flute are unknown; however, an air of mystery and fear surrounds the eldritch instrument. As an action, you may begin a performance on the flute that conjures up the otherworldly resonance of the deep. All targets within 100 feet of you that are capable of hearing begin to cough up seawater and choke. They must make a DC 17 Constitution saving throw. On a failure, they begin to suffocate from the salty water. When a creature is suffocating, it can survive for a number of rounds equal to its Constitution modifier (minimum of 1 round). At the start of its next turn, it drops to 0 hit points and is dying, and it can’t regain hit points or be stabilized until it can breathe again. Once you have conducted a performance, you cannot do so again until the next dawn.