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

Prerequisites

• Fiendlash 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 Fiendlash trigger
3. Resolve the Mogg Maniac trigger, dealing damage to an applicable target
4. Resolve the Fiendlash trigger, targeting you, but dealing damage to Mogg Maniac instead due to With Great Power
5. Repeat from step 2

Results

• Infinite damage to target opponent