The chances are actually slightly worse with multiple decks. The chance of pulling a royal flush at random from a single deck is approximately 650,000:1. 52/20 * 51/4 * 50/3 * 49/2 * 48/1 = 649,740 The chance of pulling a royal flush from a set of 5 ...
Buy two decks from the same set. It will be more fair for all parties involved and easier to find cards that go together. Get different decks though. What fun is it if you know your opponent's strategy? I suggest you wait a few weeks until Lorwyn com...
Alien workshops have good pop and Zero. also diffrent decks have diffrent ply of wood, height , width, concave. dont buy element they may be light but the nose and tail chip easily.