what's the most expensive mtg card 100 and Must-Have Cards in All of Magic MTG Foundations: Most expensive cards

As a sorcery, you may pay the mana cost of a locked door to unlock it.) Enchantment - Room Demon of Fate's Design Flying, trample Once during each of your turns, you may cast an enchantment spell by paying life equal to its mana value rather than paying its mana cost

Its a flexible cost reduction depending on what you need to produce, and it comes with self reset/protection

Those stats are enough to make them worth considering, but not necessarily one of the best cards from Kamigawa: Neon Dynasty by itself

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