pokemon card vivillon (193/191) – PokeGuard RarityUncommon Hit Points120 HP Grass Miracle Power (50) Flip a coin Pokémon is known for releasing

And this ties into

If you cast an X spell without paying its mana cost, perhaps from the effect of Beseech the Mirror, you cant pay anything for and its treated as 0 on the stack

SumNeuron at Commanders Herald did a Scryfall-based complexity analysis in 2021, and Wizards itself acknowledged internally that Throne of Eldraine was pushing word-count records

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Some of these lifegain cards arent just one-trick ponies

That is the idea behind the creature card Risen Reef, which perfectly depicts such an impossible phenomenon