The Kaycage
A great prison hidden away in the remote regions of Internai, this place was constructed at the close of the maelstrom war to seal away the four oldest and most powerful elemental genies, the leaders of the war that the mortal forces were unable to kill. For over a thousand years the four of them have been trapped. Each of them once commanded armies that shook the earth, now they are trapped.
Each of the four genies has its own cells within the prison. The power of this prison is derived from the four genies, the more each of them struggle, the stronger the prison that traps their opposite. Each of them is aware of this trap, but each would rather die than let their rival escape. This prison has a second purpose, the excess power from their struggles feeds into the world, helping to keep Internai lush, a payment for their war crimes.