As we said earlier, once a rebalanced card is only playable in Historic, we can balance solely around that
Deciduous mechanics, such as cycling and Saga enchantments, can be used in any set, but they won't be used with the same frequency as evergreen mechanics like flying, trample, or lifelink
Japanese sets stack two layers of rarity: gameplay tiers (C, U, R, RR) that fill packs, and chase tiers (AR, SR, SAR, UR, MUR) that drive pricing
WATER 1 [ Fish / Effect ] When this card is Normal Summoned: You can add 1 Level 3, 4 or 5 Fish-Type monster from your Deck to your hand
C Common Cyberdark End Dragon X DARK Level 12 [ MachineFusionEffect ] ATK 5000 DEF 3800 "Cyberdark Dragon" + "Cyber End Dragon" Must be either Fusion Summoned, or Special Summoned by Tributing 1 Level 10 or lower "Cyberdark" Fusion Monster equipped with "Cyber End Dragon"
The main difference, however, is that players dont battle other anime characters, but rather monsters with decks that have been fashioned around them