The Tower of Mana

A large tower tucked beside a mountain, it requires a key to get into. Inside the main room is a vast collection of books and a strange pedestal that requires four people to stand on in order for a door to open. It then leads to a large staircase, and a strange device that opens the door for the remaining three. Beyond that is a mirror puzzle that leads to the teleportation pad that leads to the Altar. All of the monsters are very dark, and they appear to be giant, animated toys and objects. You'd think the opposite, considering it's the seal of Light.