Generally, though it could vary slightly depending on the expansion, the Set Booster would contain twelve cards, comprised of 1 to 5 cards at Rare or higher, then a selection of Commons, Uncommons and a bonus 2 non-playable cards too
Fear not, those who havent seen them yet, Dot Esports has a complete list of whats inside below
As the newly released Kamigawa: Neon Dynasty and its corresponding Commander decks have added over 40 new Commanders to the format, we're going to see which are the best the set has to offer
"LEGENDARY DUELISTS: SEASON 3 STARTET AB SOFORT FR DAS YU-GI-OH
Something noteworthy and new for this set: The press release mentions that 2 sets of premium parallel cards will appear in Scarlet & Violet Prismatic Evolutions, featuring either a Pok Ball or Master Ball etched in the card background
By the way, a few days after we had been playing, I realized the playing mat written in English was actually two-sided, and the other side had everything in Japanese, plus a convenient set of rules and helpful hints (I wonder why that was not on the English side)