Right now, the only way to get rid of these extra cards is through the flair system in Pokmon TCG Pocket , which is broken for several reasons
Last Strix makes a 4000-thingy in Seven Sins
The most valuable of the bunch all come in valuable quarter century secret rare printings
While most boosters will have more Western high fantasy art styles available, Japanese boosters - and Collector Boosters worldwide - will have a second Mystical Archive aesthetic available, this time in a more traditional Japanese art style
Released 2 years prior to its English counterpart, the Japanese version of Base set features the same nostalgic artwork but with the trademark cosmos holofoil pattern that many collectors prefer instead of the standard one used by Wizards of the Coast
Earth Justice of Prophecy During your End Phase, if you have activated a "Spellbook" Spell Card previously this turn: You can banish this card from the field