March of the Four Horsemen

If a player would lose life, sacrifice a nontoken
permanent, discard a card, or a source they
control other than March of the Four Horseman
would destroy a permanent, instead each player
also loses that much life, sacrifices that many
permanents, discards that many cards, or
destroys that many permanents.
As Conquest, War, Famine, and Death rode into
the kingdom, the city arose in flames, but thus was
only the beginning of the end...