what's a side deck in yugioh GX Crystal Beast Jesse Anderson 45 Card Deck Rainbow Dragon Yu-Gi-Oh What does side deck mean?

Unless an opponent's deck has a high mana curve, choosing either two or three seems to make the most statistical sense

This means casting costs, ability costs, mana abilities that generate specific mana colors, etc

(2025-06-06) When you proliferate, you can choose any permanent that has a counter, including ones controlled by opponents

When playing against someone else, you create a deck of specific cards (like the ones above) to use in a face-to-face game

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