Blockbuster

The condition is the whole trick: damage lands only on tapped creatures and on every player, which makes this a delayed threat that punishes commitment instead of presence. Let an opponent tap out to swing or to fire activated abilities, then sacrifice the enchantment in response, and the attackers burn while your own untapped board walks away clean. The symmetry is a costume; you pick the moment, so the player who chooses when to pull the trigger keeps the upside. The three-to-each-player rider matters here too: it hits you and the opponent alike, but in a race that math can favor the red deck, closing the gap on a low-life opponent or finishing a creatureless stall outright. What it really answers is how to give red a sweeper that does not read as a Wrath. Rather than killing everything indiscriminately, it cares about combat timing and the tap state of the battlefield, rewarding the player who can bait an opponent into vulnerability over the one who simply untaps and casts. That dependence on tapped status is also the ceiling: against a patient opponent who holds creatures back and never commits to an attack, the enchantment becomes an expensive bluff, inert until the moment of sacrifice arrives.