This jewel outshines all the treasures in Earthsea. It is known as the Terrenon. Would you like to see it?
Curiosity overtook him when she mentioned a powerful jewel that had it's sanctuary in Terrenon.
She lead him from the hall, out through the narrow corridors of the base of the tower, and down stairs underground to a locked door which she unlocked with a silver key.
A sickness came over Ged as he felt the power of the stone. This was the founding stone of the tower, this was the central place, and it was cold, bitter cold and he knew; an old and terrible spirit was imprisoned in that block of stone.