I wish that i needed 2 keys, am still at stage 6 sadly with my calculations by the end i will hopefully have enough to get stage 10 so i will still need 2 keys which i can't get. I will be honest if this event was mentioned in the emails we get from the newsletter i would have played early but unfortunately it wasn't mentioned so i started late. I also think that it's better for the game and the players to put the keys separately this way more players would have the incentive to buy them.