Heartless Hidetsugu, and Corrupted Conscience

Prerequisites

• Heartless Hidetsugu on the battlefield
• Corrupted Conscience on the battlefield
• Heartless Hidetsugu does not have summoning sickness
• Corrupted Conscience attached to Heartless Hidetsugu
• Your opponents have a life total of twenty or greater, minus two for each poison counter they have
• Your life total is no greater than nineteen, minus two for each poison counter you have

Steps

1. Activate Heartless Hidetsugu by tapping it, causing each player to get a number of poison counters equal to half their life total, rounded down
2. Each opponent loses the game due to having ten or more poison counters

Results

• Each opponent loses the game