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Scarcity drives the market

Other printings of Onix $25.25 Onix Southern Islands $13.69 Onix Aquapolis $2.27 Onix FireRed & LeafGreen $0.43 Onix Plasma Freeze $0.13 Onix 151 $1.48 Onix Neo Genesis $0.90 Onix Base Set 2 $0.89 Onix Base Set Most valuable cards in Unified Minds View the full price guide $329.14 Misty's Favor Unified Minds $266.97 Mega Sableye & Tyranitar-GX Unified Minds $243.01 Raichu & Alolan Raichu-GX Unified Minds $218.19 Mewtwo & Mew-GX Unified Minds $194.90 Slowpoke & Psyduck-GX Unified Minds $129.10 Slowpoke & Psyduck-GX Unified Minds $124.59 Dragonite-GX Unified Minds $113.63 Raichu & Alolan Raichu-GX Unified Minds More cards by Hitoshi Ariga $176.43 Sabrina's Suggestion Team Up $145.09 Red & Blue Cosmic Eclipse $127.30 Pikachu Cosmic Eclipse $50.02 Steven's Resolve Celestial Storm $48.84 Welder Unbroken Bonds $44.45 Pikachu-EX XY Black Star Promos $32.12 Flapple SWSH Black Star Promos $28.43 Teammates Primal Clash Discover Keep browsing Fighting typeFighting type Pokmon cards SetUnified Minds Most valuableTop 100 Pokmon cards You might also like...

I guess that's just a sad, sad wisp of a dream

Wall of Stolen Identity Wall of Stolen Identity strikes me as an interesting bit of tech that locks down anything that wants to attack

Legality depends on the tournament format -- Varina, Lich Queen can be legal in some formats and banned or restricted in others