Furthermore, a player's deck and sideboard cannot feature more than four copies of any single card
They will very likely be able to make some tests and verify a card for you
If they know its in your deck, its not that useful but you can be pretty safe in assuming if you go to Worlds that no one will know that its in your deck as long as youre quiet about it
Therefore, if Grand Master of Flowers has six loyalty and you activate one of his abilities, he will be a 7/7 Dragon God with flying and indestructible before players can respond to the loyalty ability
This gimmick, which dates back to the early Gym Heroes and Gym Leaders sets, features Pokmon cards that "belong" to a specific trainer from the game
For collectors, it means the potential first appearance of important characters in card form