ancient cards pokemon Mew Promo ミュウ Ancient Trait (TCG) - Bulbapedia,

Floor 4F After entering floor 4F, immediately go down into a small room

However, the Shattered Glass Transformers card treatments will appear only in The Brothers' War Collector Boosters

As was the case with Pokmon TCG Online, players will be able to add digital equivalents to physical cards they find in packs containing unique QR codes

With just two copies in the graveyard, theyll each cost just one red mana

Chart shows the price of Krokorok [Reverse Holo] #108 at the end of each month going back as long as we have tracked the item.

They need a device (the e-reader), and also you dont play with the cards themselves but just slide them in the e-reader to unlock specific items and battle in the GBA/GC games