Repercussion, Mogg Maniac, and With Great Power...

Prerequisites

• Repercussion on the battlefield
• Mogg Maniac on the battlefield
• With Great Power
• on the battlefield

Steps

1. Deal damage to Mogg Maniac
2. Mogg Maniac and Repercussion trigger
3. Resolve the Mogg Maniac trigger, dealing damage to an applicable target
4. Resolve the Repercussion trigger, dealing damage to Mogg Maniac instead of you due to With Great Power
5. Repeat from step 2

Results

• Infinite damage to target opponent