Either way the practical effect is real: Japanese sets produce more high rarity cards per case than English equivalents, which increases supply and can soften prices on Japanese graded copies of those cards specifically
Its just a 2-card collector booster, with one card being a rare or mythic from the set and the other being a foil common or uncommon
Not all cards have a version in this rarity, but those that do have a unique art style are usually only found in Japanese hobby shops
Being able to protect other creatures gives this card the Giver of Runes/Mother of Runes feel
1 Trainer ($90,000) Designed by Hideki Kazam, the Super Secret Battle "No
Honorable Mention #2 - Man-o'-War Throughout the ages, people have dropped this Jellyfish onto the battlefield and then shouted in victory as the various benefits of said bounce-ery are seen