Trough not a rule due to the expected increase in the amount of memories that a Link holds with the passage of time it is a great probability that an older Memento would be more powerful. But since only a single year passed from the appearance of the first Memento not enough data is available to link the age and the power of a Memento.

Well glad to see interest in this idea. Mirth, if you would, please vote for a city? Thanks in forward.