After two days of preparation, which also included practising against other representative teams' card decks, Ree Shil and his teammates had rehearsed several sets of decks.
He was basically the core in all of them. To cooperate with his cards, his teammates actually switched decks several times.
The remaining team members acted as sparring partners for these decks.
Since everyone had signed a card player's contract, there was no fear of information leaks.
Moreover, with the honor of representing The Major District, no one would engage in any misconduct; everyone was trying their best to collaborate.
Even Samuel Chess, who had no chance to play and wasn't suitable as a sparring partner, also...
Well, he couldn't do a damn thing.
In short, these two days were a process of identifying and fixing weaknesses. The tactics centered around Ree Shil had a victory rate as high as 95% within the team.