Without Iridescent Hornbeetle, Skyclave Shadowcat, and other uncommon payoffs, GB has very underwhelming payoffs at common
The duels and tournament play allowed you to play with any deck you built, or the pre-made decks that came with the game, against any one opponent, or you could run the gauntlet and play a tournament
While most people were focused on the Lions Eye Diamonds and Lotus Vales of the world, Flash quietly picked up errata that basically made it so that you couldnt just pick a creature and not pay for it, so that you could do the enters the battlefield trick which was the exact trick the card was originally designed to allow for (albeit, long before they conceived of just how big of design constraints this could put on them in the future if they changed the types of creatures they made)
This will either grant you card draw or turn into a Ruric Thar effect that doesnt affect you
Key details of the One Piece OP-02 Paramount War set: These factors explain why the One-Piece Paramount War card list continues to gain attention from collectors and competitive players alike