Archfiend of the Dross and Blim on the battlefield.
Archfiend of the Dross has no more than four oil counters on it.
Blim does not have summoning sickness and cannot be blocked by an opponent.
({1} magic symbol) ({B} magic symbol) available.
Steps
Cast Heartless Act by paying ({1} magic symbol) ({B} magic symbol) , removing up to three oil counters from Archfiend of the Dross.
Deal combat damage to an opponent using Blim.
Blim triggers, giving control of Archfiend of the Dross to the damaged opponent.
At the beginning of the opponent's next upkeep, Archfiend of the Dross triggers, causing the opponent to remove an oil counter from it and lose the game.
Results
Target opponent loses the game at the beginning of their next upkeep.