Worldgorger Dragon enters the battlefield, exiling all other permanents you control.
Cast
Worldfire by paying ({6} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) , exiling all permanents, all cards in all hands and graveyards, and setting each player's life total to one.
Worldgorger Dragon leaves the battlefield, returning all cards exiled with it to the battlefield under your control.
Results
Exile all cards in hands and graveyards.
Exile all permanents opponents control.
Near-infinite lifeloss for all players.
Set all life totals to 1.
Mass Land Denial.
Metadata
In 522 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Ruthless (Bracket 4+).