A Series of Unfortunate Rolls
Necklace of Adaptation
Current owner: Linny Minnie Bumblebey
Purchased from the pawn shop in Waterdeep for 400 gp just before leaving for the Phantom Limit (Act III, Ep 1).
While wearing this necklace, you can breathe normally in any environment (including underwater), and you have advantage on saving throws made against harmful gases and vapors (such as cloudkill and stinking cloud effects, inhaled poisons, and the breath weapons of some dragons).
A thin band made of gold with red and transparent crystals dangling from each side, this necklace was pawned by a disgraced former World Breath Holding champion.