The Imperial Palace is
home to Emperor Solarius of The Glorious Empire and is protected by an anti-magic shield. It also leads to the Arena Dungeons, and is surrounded by a large courtyard. You have to traverse the palace before you face off the Devourer boss battle. The Magic Containment Room is located in the palace, and, as its name suggests, is where all the magic collected by the Emperor is kept. It contains a large cylindrical vat where all the magic is kept, and Solarius leaps into it hoping to become a god. However, he becomes a hideous slug-like monstrosity known as the Devourer, and destroys the majority of the palace in the process. After the final battle,it won't be accessible anymore.