All Will Be One, Opalescence, and Tainted Strike

Prerequisites

• All Will Be One on the battlefield
• Opalescence on the battlefield
• Tainted Strike in hand
• You have a way to put a counter on a permanent or player
• available

Steps

1. Cast Tainted Strike by paying , giving All Will Be One +1/+0 and infect until end of turn
2. Put a counter on a permanent or player
3. All Will Be One triggers, giving an opponent a poison counter and causing you to gain 1 life
4. Repeat step 3

Results

• Each opponent loses the game