Each opponent loses the gameExile all cards in hands and graveyardsExile all permanentsNear-infinite lifeloss for all playersMass Land Denial
How it works
Cast Mizzix's Mastery for its overload cost by paying 5, exiling each instant and sorcery card in your graveyard and casting them without paying their mana costs.
Resolve the copy of Worldfire, exiling all permanents, all cards in all hands and graveyards, and setting each player's life total to 1.
Resolve the copy of the instant or sorcery that deals damage or causes lifeloss, causing each opponent to lose at least 1 life or be dealt at least 1 damage.
Each opponent loses the game due to having 0 or less life.