It can destroy an artifact or destroy an enchantment, draw a card, or help ramp you ahead in the game
I had a friend once who actually paid another one of his friends to build his decks for him
If another creature enters the battlefield as or becomes a copy of Pirated Copy, it will copy whatever Pirated Copy is copying, be a Pirate in addition to its other types, and have "Whenever this creature or another creature with the same name deals combat damage to a player, you draw a card." If Pirated Copy doesn't enter the battlefield as a creature (such as by copying an artifact or land that became a creature), it doesn't become a Pirate, though it still has the granted triggered ability
But assuming nothing surprising happens, these are the decks to be looking out for
The Tera Charizard is one of the best pulls from this set , as well as the shiny Mew ex, a full art Gardevoir, and a Miraidon ex, which are all well worth finding