Lightning Runner, Cursed Mirror, and Wulfgar of Icewind Dale

Prerequisites

• Lightning Runner on the battlefield
• Cursed Mirror on the battlefield
• Wulfgar of Icewind Dale on the battlefield
• Cursed Mirror is a copy of Lightning Runner
• Your opponents can not block either Lightning Runner

Steps

1. Attack with both Lightning Runners
2. Both Lightning Runners trigger twice
3. Resolve the first three triggers, adding and chosing not to pay the trigger
4. Resolve the fourth trigger, adding and pay to untap all creatures you control, and after this phase, there is an additional combat phase
5. Repeat

Results

• Infinite combat phases
• Infinite damage