Prized Possesions
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Standard (mostly) unupped, limited # rares:
Each deck can only have 1 rare for every 10 cards, 1 common upped for every 20 cards or 1 rare upped for every 30 cards
I.e. minimum number of cards in deck most follow formula -> 10*#Unupped Rares + 20*#Upped Commons +30*#Upped Rares
Elemental Parity
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Can only use cards from elements on the left quantum type column (dark, death, earth, fire, gravity, time) with an odd casting cost (except pillars and pendulums)
Can only use cards from elements on the right quantum type column (water, life, aether, air entropy, light) with an even casting cost
Cards of type other can be used freely.