Asphyxiant Marble

This small transparent sphere is filled with a green gas and measures 1 inch in diameter and weighs 1 ounce.

You can use an action to throw the marble up to 60 feet. The marble explodes on impact and is destroyed, releasing nauseating gas that lingers in the air for 1 minute within a 20-foot radius of its impact.

Each creature that is completely within the cloud at the start of its turn must make a DC 13 Constitution saving throw against poison. On a failed save, the creature spends its action that turn retching and reeling. Creatures that don’t need to breathe or are immune to poison automatically succeed on this saving throw.

A moderate wind (at least 10 miles per hour) disperses the cloud after 4 rounds. A strong wind (at least 20 miles per hour) disperses it after 1 round.

If the marble explodes within the air envelope of a spelljamming ship, the air quality within that envelope degrades by 60 days worth of air.