The Color Pie is used to ensure new cards are thematically in the correct color and do not infringe on the territory of other colors
The best method depends on your collecting goals and how you interact with your collection
You can only have one copy of a uniquely named legendary card on your side on the battlefield at a time
One of the leaders is Aatchik, Emerald Radian, and one of the team's Vehicles is Thunderous Velocipede Aether Rangers - Green and Blue color identity
If youre not able to intuitively glean it looking at it, traps are a card that do something, and have an alternate, reduced cost, based on your opponent doing something that makes the trap even more effective
When Yuma was reunited with Astral after the latter was injured by Number 96, ZEXAL II was further upgraded into ZEXAL III