The format always uses the most recent few sets of cards
These prices are determined by the average market price from cards listed on TCGplayer, and are subject to fluctuations as time passes and the competitive meta evolves
Edit: although I guess the coros which came a month or so before might be considered mass produced too Dyl March 9, 2025, 9:28pm 15 Are these non-TCG items Pokemon cards
5 Unstable Harmonics / Rhystic Study By Riot Games - $63.98 SLD #478 Secret Lair x Arcane This card from the Arcane Cross-Over Secret Lair drop is based on Jayce and Viktor Talis' discovery of Arcane magic and their work in using science to harness this power
There's really nothing to lose if you're in the market for it
These requirements differ slightly from game to game, but most commonly involve owning more than one game or obtaining Regirock, Regice, and Registeel