I assume you're referring to Otherworld. For the record, by the way, Yojimbo is not a mandatory Aeon, and could also be classified as hidden.

By the way, the usual procedure with a riddle or quiz thread is to allow the person who got the question correct to ask the next one. It's your thread, so you can do it this way if you like, but I strongly suspect that it will be closed if it gets too competitive at any point.