Duke Ulder Ravengard, and Blightsteel Colossus

Prerequisites

• Duke Ulder Ravengard on the battlefield
• Blightsteel Colossus on the battlefield
• Opponents are unable to block and kill your creatures

Steps

1. At the beginning of your combat phase, Duke triggers, giving Blightsteel Colossus haste and myriad until end of turn
2. Declare Blightsteel Colossus as an attacker
3. Blightsteel Colossus' myriad ability triggers, creating a token copy of itself attacking each other opponent
4. Deal combat damage with each Blightsteel Colossus, giving each opponent eleven poison counters
5. Each opponent loses the game due to having ten or more poison counters

Results

• Each opponent loses the game