I've already gone over how to buy Master Keys without spending a dime . But, because there are so many uses for Dilithium and Zen, suppose you don't want to use such a precious resource for buying Master Keys? This is perfectly understandable. So, how else can you buy them? Energy Credits! Many players are more adept at earning Energy Credits than they are anything else. If anything, once you become a Vice Admiral, the need for Energy Credits goes down. You can get most anything you want through enough play and a bit of luck. Moreover, as you go through the end-game content, you will continue to earn drops and other rewards. You will need to make use of the Exchange in order to really earn credits, however. Keeping track of changes in the game will also help you find needs other players may have. This is important, as the more necessary the item is, and the more inconvenient it is to get, the more its potentially worth. Additionally, if things fluctuate in value, k...