Scarf of Athreos

Wondrous item, uncommon

Price: 500-4,000 gp | low sentimentality

This scarf has been blessed by clerics of Athreos, the god of passage who ferries souls of the dead to the Underworld. It protects travelers so they’re able to reach their intended destinations. It also protects the living so that they don’t meet their death before their fated time.

Paid

Once a day, while you wear the scarf, it automatically covers your face if you’re exposed to a poisonous substance, giving you advantage on your Constitution saving throw against the poison’s effects.

Overpaid

While you wear the scarf, it constricts lightly around you to warn you if you’re about to ingest a poisonous object.

Source: The Gray Merchant of Asphodel