yugioh cards tcg Yu-Gi-Oh! Trading Card Game 24 Single Cards, Lot (Y10) their family Yu-Gi-Oh! Single Card (Asia English)

It is the Pokmon Center-exclusive Elite Trainer Box for the Western release of the Mega Darkrai ex expansionknown in English as "Pitch Black"which includes additional booster packs and promo cards compared to the standard ETB

It is one of the many prize cards that allow you to win the match by attacking with a specific monster (in this case Pendulum)

Pretty cheap to acquire one as well

Eevee, Flareon, Vaporeon, Jolteon, Espeon, Umbreon, Leafeon, and Glaceon are all getting brand new ex cards, while Sylveon ex is getting reprinted from Surging Sparks

The "Rad Superdrop" includes unique cards for Lucy, the Ghoul, and Maximus from the Amazon series, none of which are all that game-breaking by any means (which is sometimes the complaint with unique cards showing up in Secret Lair)