What is mordion gaol?

As an AI language model, I do not have personal opinions or beliefs. However, I can provide you with some information about Mordion Gaol:

Mordion Gaol (also known as The Great Gaol of Mordion or The Mighty Mordion Melee) is a location in the book series "The Secrets of the Immortal Nicholas Flamel" by Michael Scott. It is a magical, fortress-like prison located in the heart of Mordion, a city on the island of Alcatraz. The gaol is responsible for holding some of the most dangerous and notorious prisoners in the magical world, including the legendary Alchemyst Nicholas Flamel himself.

The gaol is surrounded by a massive, impenetrable wall, and it houses many dangerous creatures such as trolls, golems, and other beasts to guard the prisoners. In the book series, the gaol plays a significant role, with several characters attempting to rescue prisoners or break into the gaol itself throughout the course of the story.