Dragon's Howl Prison

After a series of tragic events involving magic and wizardry, the Cloaken Monks declared all magic to be illegal. As one might expect, the wizarding world resisted, and fighting broke out. Eventually, the conflict involved most of the kingdom and became known as the First Wizards War. 

The Cloaken Monks, with far superior numbers, were victorious over the wizards, and the war ended with many wizards dead, most in hiding and the leaders in custody. The wizards considered the greatest threat were taken to a newly constructed prison known as Dragon's Howl. Here, they were locked in tiny cells, and any use or suspected use of magic was met with extreme measures. Many wizards died in Dragon's Howl Prison. Some froze to death during the brutal winter, others starved to death or succumbed to the elements after being locked in small cages with no protection from the weather and given little or no food.

In the center of the prison was the largest  known to exist. The Cloaken Monks believed the stone had the power to block magical spells and suppress magical powers. Many weapons had been formed from Obsidian during the war and used against the wizards.

The Wizards held in the prison were some of the most knowledgeable and powerful wizards in the world. Eventually, they were able to organize an uprising and, after killing many of the guards, escaped to freedom. They then went on to lead the remnant of the wizarding world in the Second Wizard's War. Tragically, nearly all of the wizards who were not able to escape the prison were executed or allowed to starve to death. 

Dragon's Howl Prison is now abandoned and in ruins. It is known as the most haunted place in the kingdom. The wizards who suffered and died there remain, using their powers to torment, and if reports are to be believed, kill anyone who trespasses into their eternal resting place.