10 GRAY TOWER. This tower is of the same gray dressed stone as the main castle and connects to the castle by a wall. It appears to be about twenty five feet tall and rises to a pyramidal peak, like an obelisk. From the outside it is not accessible in the conventional manner and is surrounded by hedges. It can be reached by the burrows at Area 9. Any person using a passwall, teleport, or other means of entry will find themselves in Room 10A instead of a higher floor, even if they try flying to the peak and using passwall there.
Inside, the Gray Tower is actually five floors, one of which is underground. The other four floors can be reached by magical portals leading from one to another. The tower is larger on the inside than it is on the outside and the ceiling of each room is ten feet.
The tower was built as a prison for an artificial life form, which is located in Room 10E.