Enter the Infinite

The honest version of "win the game": draw your entire library, slot one card back on top so the deck-out clause never touches you, and end the turn holding nearly everything you own. Twelve mana with a quadruple-blue commitment is the wall built to keep that promise from being casual, and the discipline is in what the spell deliberately refuses to do: there is no built-in payoff, no damage clause, no automatic kill. It hands you the whole library and then asks you to already have the answer. That makes it a setup piece rather than a finisher, the inversion that defines it. Most large-mana spells are the last card you cast; this is the second-to-last, a fork that demands an outlet capable of converting a full deck into one lethal turn (a free-spell chain, a payoff that triggers on each card, a storm count that crosses the finish line). In practice the spell is almost never cast on raw mana and the turn almost never passes: it lives behind Omniscience or a burst of fast mana, resolving and killing in the same window, because handing an opponent a turn with your deck in your hand is a fragility no list can afford. The "no maximum hand size" rider is the mercy that keeps the dream from collapsing on the cleanup step, sparing you the indignity of discarding your own win down to seven.