Pro players are truly challenging to create, however entirely worth it as they take any existing player to a supreme level. In order to create such an incredible player, you will require 2 similar cards brought at the optimum level. You combine these 2 cards into one, producing a brand name new player with a boost in its base stats. This is absolutely time incredibly pricey and consuming, however it's the only way to get the upper hand once you have some play time under your belt and a currently strong deck constructed.