Cast Exchange of Words by paying ({1} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Exchange of Words enters the battlefield, swapping the text boxes of Archfiend of the Dross and an opposing creature that does not have more than one oil counter on it.
At the beginning of the opposing creature's controller's next upkeep, their creature triggers, causing them to remove an oil counter from that creature and lose the game.
Results
Target opponent loses the game at the beginning of their next upkeep.