Archfiend of the Dross, Heartless Act, and Switcheroo

Prerequisites

• Archfiend of the Dross on the battlefield
• Heartless Act in hand
• Switcheroo in hand
• An opponent controls a creature
• Archfiend of the Dross has no more than four oil counters on it
• available

Steps

1. Cast Heartless Act by paying , removing up to three oil counters from Archfiend of the Dross
2. Cast Switcheroo by paying , exchanging control of Archfiend of the Dross and a creature with an opponent
3. 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