The Black Citadel

You spin on your heels out of the way of the fireball that's flying straight towards you. The fireball slams into the ground behind you. You continue the charge, but to your astonishment they all vanish as you get within a few metres of them. You walk over to where they were and notice a peculiar looking stone square with demonic looking designs engraved into it. There are four paths to choose from that exit the clearing.