It does not feel like a manipulation attempt, due to the use of localized rewards (just in the arena), in fact, it does not actually prevent any progress, just help certain when you play the arena regularly. Of course, people always look at this from another point of view. Instead of adding 5 coins, they are actually removing those. You can have 100 coins, but because the arena you have 95. I ... you use these cards depends on you! They are great memories of games or go fishing. You can also choose to let the children play war. If you think of other great games, please share the following!