mystery booster box magic the Gathering: Unlike customary reprints MTG Mystery Booster 2 Unboxing

It was so game-defining as a stax piece that it eventually got removed

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Certainly if you are proliferating or something it's more useful, but a slot in a deck and that much mana you want more bang for your buck generally

There are two deckbuilding details I want to mention still: Some decks run as little of the "U.A." monsters as possible, potentially running only one copy of every high-level monster because they are easily searchable and accessable

Yes, after all effects and attacks resolve, it becomes your turn

You can only use this effect of "Yuki-Musume, the Ice Mayakashi" once per turn