Stone-Tongue Basilisk

Most fighters with a destroy-on-damage rider earn their keep by trading up: poke a creature, kill it, walk away with the body intact. The first ability here works that way, with a delay clause (the destruction waits until end of combat) that mostly matters for stacking blocks and regeneration timing rather than the trade itself. Threshold rewrites the math. Once seven cards fill the graveyard, every creature able to block this Basilisk must, and the destroy-on-damage rider goes to work on whatever the compulsion drags in front of it. The opponent loses the freedom to chump with a single throwaway blocker; the whole eligible board is committed at once. But the kill is not a board wipe, and the design is more honest than that suggests. With four power and no deathtouch, damage assignment forces lethal toughness onto each blocker in order before moving on, so the Basilisk destroys at most four one-toughness creatures and frequently only one or two with real bodies. The rest block, soak nothing useful, and survive. Meanwhile the 4/5 has no first strike, no evasion, and nothing keeping it alive: the combined damage of everything it lured almost always kills it on the same swing. So Threshold turns it into a one-time forced exchange, a suicide alpha strike that trades the Basilisk and clips a few blockers, not a Plague Wind. The cost of even that much is seven mana and triple green, paid up front and held in reserve until the yard fills.