japanese pokemon cards pack Random Booster Lot of 4 : Toys & Games themed twin SV5K Wild Force booster box

This supply bottleneck is what pushes the price ceiling higher, creating valuations in the millions of yen (tens of thousands of dollars)

Particularly, women with realistic body types

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

An example would be fetch counters, used to mark cards exiled by [c]Haldan, Avid Arcanist[/c], and [c]Pako, Arcane Retriever[/c]