Peculiar Curios of Undrgrin
A vessel containing a lightning toad. These strange creatures have crystalline growths lining their back which glow brightly when ingesting metal.
Lightning toads seem content while confined in jars as long as they have air, earth, and some vegetation, but they may flee if their jar is broken.
???? What does it do?
The party has been told it purifies and enhances natural sources of water. They have seen it leaves a trail of perfectly clean ground.