Necklace of adaptation

A necklace of adaptation was a magical necklace that protected the wearer from things that affected their ability to breathe.

Description
It took the form of a platinum medallion hanging on a heavy chain.

This necklace allowed the user to breathe under suffocating circumstances, even when underwater but not in a vacuum such as space. This in turn made gives the user advantage on saves for all harmful gases and vapors, such as inhaled poisons and magical effects like stinking cloud or cloudkill.

Creation
Crafting one required an alter self spell.

Notable Owners

 * Calvin Longbottle owned a scrimshaw version of this amulet that was shaped like a porpoise.

Trivia
Monadic devas could naturally breathe in any environment as if they wore a necklace of adaptation.

Appearances

 * Card Games
 * AD&D Trading Cards