As was reported on the official Yu-Gi-Oh website at the time, events at the venue included a King of Games competition allowing players to compete against invited duelists representing some of the most talented players in the game, an open arena for anyone to pull out a mat and get down to duel, as well as (obviously) a place to buy new cards
Sure, you'd rather save your creatures with counters on them instead, but being refunded a few extra cards isn't too bad of a consolation prize if you can't dodge a board wipe
Those Crystals are the e-Series heirs to the Shining Pokmon of the Neo era, each carrying the Crystal Type Pok-BODY that lets the card shift its type depending on the Energy you attach
If you control a Spellcaster-Type monster, you can Tribute 1 monster from your field in order to Special Summon a Spellcaster-Type monster from your hand
(However, the weird Happy Meal-shaped mascot on the bag is downright terrifying, with his too-wide mouth that looks like he would rather consume me than the apple slices
Get Ready for Cosmic Power: Pokmon Stellar Miracle Japanese Booster Packs - Scarlet & Violet Series