Vitriolic Key

Full Item Description
A thin sickly yellow-green skeleton key, of an unknown metal, that seems to slightly hot and hisses when in contact with skin. If examined closely, a breach can be found between the head and the handle.
You can actually unscrew the tip of the key to reveal a crusty yellow buildup inside. This is the lifeblood of the Vitriolic Key.
History, Creation, and Now...
Eons ago, a demonic essence, known to mortals as Asyd-Tung, was the first to create a Vitriolic Key. It is said that he cursed the name of a Thief-God, drank the venom of a Snake-God, then urinated on the blessed anvil of a Forge-God. When the furious smoke cleared, upon the desecrated alter was the first, and most potent, Vitriolic Key. Now only a legend; others have been crafted in it's wake.
To create your own Vitriolic Key you must perform a special ritual. The ritual involves openly cursing the name of a Thief-God, drinking venom sacred to the worshipers of a Snake-God, and them urinating onto an anvil that once received the blessings of a Forge-God.
One you have scorned the The Demon-Scarred Gods, Asyd-Tung will grand your urine a corrosive property for a brief time. It will burn like the fires of Hell when you pee, and if you act quickly you can fill a specially prepared holding device (The Vitriolic Key) with your urine. Seal it and let it sit in a dark place for a few days, and when you return to it you will have your very own Vitriolic Key.
These days...
The Vitriolic Key is a sign of an Asyd-Tung cultist, considered a blasphemous device by worshipers of the Three Demon-Scarred Gods, and a potent way to melt small objects.
Properties
When the crusty yellow buildup inside the key is broken against an object it turns into one of the most, if not the most, corrosive acids known to the mortal world. It is said that the original Vitriolic Key had the power to dissolve divine essence, it is unknown if this is true but it does seem to have the power to melt just about anything else. After each use, the substance takes up to three months to replenish it's supply of corrosive crust.
Typical uses include destroying locks, torturing prisoners, and melting objects together.
If the key is snapped in half it will melt into a small cloud of burning mist that will dissolve the hands of whoever snapped it and anything else next to it.
Asyd-Tung and his Cultists
The original demonic essence behind the creation of the Vitriolic Key has long since been destroyed, but where there are cultists there are those willing to be worshiped by them. There is now a whole council of demons wearing the mask of Asyd-Tung.
Their goals stretch from collecting innocent souls, one of the most precious form of currency in Hell, to flooding the world with acid so they can bathe in the melted bodies of all the mortal creatures that they hate.
The cultists don't know a damn thing. Most of them are abnormal thieves who love the power of acid, or just your typical crazed followers whose brains have been rotted by too much exposure to corrosive smoke. They do what the demons ask them to do and continue to recruit more followers under the guise of a cult of purification.