Pyrrhic Revival

The symmetry is the trap, and the trap is the point. A mass reanimation that fires for every graveyard at once reads like a gift to the table until you account for the -1/-1 counter riding along with each returning body. That clause is what keeps the spell from being a pure giveaway: every creature comes back one step closer to death, so the X/1 mana dork dies on arrival, the cheap token-fodder body returns useless, and only the creatures with toughness to spare survive the toll. The asymmetry, then, is not paid for on the mana line; it is paid for in deckbuilding. The builder who fills a graveyard with fat, high-toughness threats hands the difference back to opponents whose yards are clogged with disposable chaff that cannot absorb the counter. The same clause folds neatly into any shell that already wants -1/-1 counters on the battlefield, where the downside becomes upside. This belongs to the lineage of symmetrical-effect-with-asymmetrical-payoff designs, where breaking the symmetry costs nothing extra in mana and everything in setup: the spell rewards whoever has done the work to make their graveyard the only one worth raising, and punishes whoever has not.