These are some of my gold card collection. I got this card apart from rewards, I also bought it at the shop. The advantage of having a gold card is that apart from this card, it can be resold if the price goes up so that it can increase the number of dec coins that we have, also increasing the amount of power for us to battle every day. 
So more gold card that we have more power also adding to the account. If the power is large, we can also raise our account level from bronze to silver or gold and platinum as long as it complete the requested power because a lot of power is needed to level up.
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