Necklace of Adaptation

Wondrous item, uncommon (requires attunement)

While wearing this necklace, you can breathe normally in any environment, and you have Advantage on saving throws made to avoid or end the Poisoned condition.

Worth around 400 gp, the 2024 value for an uncommon wondrous item. How item prices work

Necklace of Adaptation is from the System Reference Document 5.2.1 (“SRD 5.2.1”) by Wizards of the Coast LLC, used under the Creative Commons Attribution 4.0 International License. Full attribution is on the Licenses & Attribution page.