Uh... there're only three of the Opera box-systems. Tperie still has one (that she doesn't use), Flux has another, and we all know who has the third. Tperie uses the more powerful Eyes of God these days. <shrugs>
We may have seen it in action, already. Without knowing it.
Mmmm seems like i didnt formulate my sentence right Her sobriquet is God's eye, which she can use to see the whole tower. She also got 3 opera box systems from the workshop or something i believe, and lighthouses are based on those opera boxes right?