Fight Rigging
Hideaway has always dangled a payoff behind a gate: bury a card face down, meet a condition, and cash it in for free. The mechanic first showed up on lands, which fired the exiled card only when a threshold was already met (a big attacker, a certain amount of damage, enough creatures on board), so they read as delayed rewards that hinged on you doing the work elsewhere first. This one hands you both the win condition and the crank that turns it in the same text box. The combat trigger drops a +1/+1 counter on one of your creatures every turn whether or not you can yet play the exiled card, so the two clauses run as a slow-burn engine rather than a single conditional payoff. The seven-power threshold becomes a floor the counter builds toward on its own: a board of fat green bodies clears it almost immediately, while a leaner one can pile counters onto a single creature and grind there over several turns. Either way, the enchantment fires its hidden card the moment the math clears. What matters most is what you stashed, because you are playing it at the beginning of combat, for no mana, which rewards a large-mana-value spell with immediate impact over anything you would rather sequence deliberately. That reframes what hideaway is for here: not a rider on a permanent you were already playing, but a standalone value engine that manufactures its own key one counter at a time.
