What Are Thunderstones?
Thunderstones, are items obviously... But when hit against a object, you get a noise that will pierce anyone's earplugs and shatter anyone's eardrums leaving the victim dazed, confused, and disoriented... Also, if there are monsters nearby they'll probably hear and it can be used to set off some noise based traps, isn't that wonderful?
How were Thunderstones created?
Originally they were created by a man of the name Grzmot ( Polish for Thunder ), he was in the need of a item that would scare away the Lis for they were devastating his crops and terrorizing his family. Grzmot, formerly a bard / adventurer, imbued some stones with magic, or what little he knew of magic. He then tried them to use them and ended up mortally wounded for due to his lack of knowledge of magic, the stones were actually combustible and exploded on contact. As the stone exploded a small bug that was in it, exited the stone as it exploded. The bug entered a Lis' stomach, as it entered the Lis' stomach it reacted with the chemicals and acids in it's stomach. The bug died, but a large yellowish rock formed inside the Lis' stomach. The Lis that was the alpha male, it was larger, stronger, and smarter. It began to maniacally laugh while the animal was laughing, it choked up a yellowish stone, and as it hit the ground it emitted a large thunder noise. The Lis got scared, and ran off.
Grzmot's wife, named Cichy ( Polish for Quiet ) heard the noise, and ran to the scene to congratulate Grzmot for scaring the Lis away but, she saw Grzmot on the ground. A hunter by the name of Glono ( Polish for Lightning ) saw the incident. Grzmot's wife stayed back, soon Glosno approached Grzmot and shot him in the neck with a crossbow killing him. Grzmot's son saw the incident for he secretly followed his mother, he ran to Grzmot his mother tried to hold him back, but couldn't. She lost control, and he ran towards his father only to be shot by Glono, Cichy now wanting revenge began devising a plan, but she knew she had to wait. Glosno not knowing of Cichy's presence, took the stone and went to a alchemist.
The alchemist broke down the stone and learned it's ingredients, Glosno along with the alchemist made a fortune selling Thunderstones. Cichy, who has became of Glosno's maids, went into his bedroom during his sleep and used a thunderstone, Glosno died due to a heart attack. Cichy realized she was bit by something, she didn't know what. The next morning the local militia find Glosno dead, and Cichy's clothes on the ground, along with Lis tracks nearby. Reports of a Female Lis terrorizing local houses before running into the woods with other Lis were reported also that morning.
Emits loud noise, giving all living things ( Including PCs ) the following effects; Dazed, confused, and disorientation. If some of the animals or PCs are wearing earplugs, or are resistant, then only add confused as a affect. If deaf then add nothing. The Thunderstones also have a backfire, sometimes they'll go off unintentionally and sometimes concentrating all noise to a specific area. The area could be entirely the PCs ears likely making them deaf even with some sort of earplugs. Also could cause bleeding from the ears making it prone to infection due to a enclosed dark area unless the species/race eardrums are located outside the body.