Avacyn's Memorial

Blanket indestructibility is a well-worn white effect, but this one narrows the umbrella to exactly the permanents that matter most in a legends-heavy deck: your commander, your legendary lands, your legendary artifacts and enchantments, any legendary Planeswalkers. The eight-mana price and triple-white pip are what you pay for a static effect that never has to be held for the right moment; once it resolves, sweepers that hinge on destruction stop touching the pieces you care about, while removal that reduces toughness, exiles, or bounces still gets through. Its own indestructible keyword matters here too: printed on its own line, it keeps the anchor from being the soft target that spot removal picks off to unravel everything else. What makes it a genuine build-around rather than a generic safety net is that its value scales with how committed you are to the legendary type. In a deck stuffed with legendary creatures and artifacts it approaches a one-card wall against destruction-based board wipes; in a deck running a single commander and little else legendary, it is an expensive, narrow shield around one permanent. The card asks a specific deckbuilding question rather than answering a generic one, and that focus is the whole point.