core 2021 draft booster box Magic: The Gathering Set (M21) Collector | 15 Cards you’ll find more rare cards than appear in Draft Boosters Magic Core Set 2021: Collector

UR Ultra Rare Sea Stealth II X SPELL Continuous This card's name becomes "Umi" while on the field or in the GY

Fortunately, it shuffled itself back into the deck during the End Phase...even though in real life apparently this effect also leads to both players shuffling all cards on the field back into the deck

At the same time, the fact that 2025 will see the release of three UB sets is the most likely culprit for why in-universe sets need this change in the first place, and it may be why this decision may backfire

"Magic: The Gathering Comprehensive Rules" (PDF)

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Yeah, I am not unhappy with that line of play