Mizzix's Mastery for its overload cost by paying ({5} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) , 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.