union arena code geass booster box Arena: Having a serial number card that caused a buzz during vol.1 is being used for vol.2 as well! Union Arena - Code Geass

S9 Star Birth is out of print with no announced reprint

Marketplace TCGplayer Sets Marketplace Cardmarket Sets Market Trend Price History Deck Usage & Meta Stats Public deck and tournament usage for Shaddoll Squamata

IIRC in Yugioh there is only a certain number of Blue-Eyes (from the show?), so you could put a rule on the card 'there may only be X Blue-Eyes on the battlefield at any time', Star Wars CCG used to have permanents that you could have 2 or 3 copies of in play, in addition to stuff you could only have 1 of, the concept would work fine here too, only this could care about both players' boards

GSE Gold Secret Dark Advance X TRAP During either player's Main Phase or Battle Phase: Target 1 monster in your Graveyard with 2400 or more ATK and 1000 DEF

You can tap any untapped tokens you control, including creature tokens you control that you haven't controlled continuously since the beginning of your most recent turn, to pay the cost of Hazel of the Rootbloom's activated ability

How to Play : Use Flare Strike as a strong opening hit, then switch Cinderace out to reset the cooldown