Masked Gorgon

Most protection lines protect their owner; this one starts by protecting the enemy. As printed, the 5/5 hands every green and white creature protection from Gorgons, which means those creatures can block it and walk away unscathed: they take no combat damage from it, even as they deal their own. Early on it is a midrange body that refuses to fight half the color pie on equal terms. The Threshold clause does not undo that gift. The static grant to green and white creatures stays on the battlefield permanently; what changes is that, with seven cards in the graveyard, the Gorgon gains its own protection from green and white on top of it. Now the relationship is symmetrical in the Gorgon's favor: GW creatures still cannot be damaged by it in combat, but it can no longer be blocked or targeted by them either, turning a backloaded liability into an unblockable finisher against exactly those decks. The order of operations is the design conceit, a clean "weak now, lethal later" payoff for a graveyard you have spent the game filling. The discipline is in the narrowness: against a deck running neither green nor white, the Threshold half is inert, and you are left with a 5/5 that still carries its protection-granting static ability doing nothing useful. It rewards a stocked yard and a metagame leaning on GW creatures, and very little else.