Aside from the promo card, you'll receive either nine (standard) or 11 (PCE) packs, as well as 65 card sleeves, 45 energy cards, a guide, a six-sided die, two condition markers, and four dividers to help organize your collection
After the Swiss Rounds are complete, the Top 8 Duelists will play one (1) Single Elimination Round in the Quarter Finals
Because of the Extra Deck Fiend xenolocking imposed by "EvilTwin" monsters, most of these external synergies involve Main Deck or Fiend support, or must complete their non-Fiend Extra Deck plays before going into the "EvilTwin" Extra Deck plays
You could try and sell these kinds of cards in a private sale
Being new to the hobby Im sure theres a lot of cards Im simply unaware of and dont have a huge collection to date, so a small pool to select from but would say the FA Blastoise ex from the 20th Anniversary set is probably whats surprised me most from purchase expectations (bought mostly due to price) to how it looks in person