A pearl ring.

In your search through the various odds and ends of the curio stalls, you find yourself gravitating towards a lacquered wooden box full of jewelry. One of the rings feels oddly warm in your hand. You look down at the silver ring set with a lustrous pearl, and feel {if Corruption < 79
}an intense heat in your stomach, bordering on nausea.{else
}a soothing warmth in your stomach and chest. {endif
}
"I see you have an eye for magic, my dear." The smooth voiced merchant sidles up next to you. "That ring is quite a rarity: a boon against the demonic taint." He lowers his voice. "Such items are highly sought after beyond the range of the crystals."
{if Corruption < 79
}The nausea begins to fade, but the ring is still very warm to your touch. {else
}You rub the pearl idly with your thumb. {endif
}"How...how much do you want for it?"
"45 gold pieces."
{if Gold <45
}You shake your head. I can't afford it. {endif
}
You have discovered the Pearl Ring: The ring can be used while camping to instantly wipe away corruption. It can only absorb a finite amount before crumbling away.