Fiendlash, Stuffy Doll, and With Great Power...

Prerequisites

• Fiendlash on the battlefield
• Stuffy Doll on the battlefield
• With Great Power
• on the battlefield

Steps

1. Deal damage to Stuffy Doll, either using its ability or another method
2. Stuffy Doll and Fiendlash trigger
3. Resolve the Stuffy Doll trigger, dealing damage to the named player
4. Resolve the Fiendlash trigger, targeting you, but dealing damage to Stuffy Doll instead due to With Great Power
5. Repeat from step 2

Results

• Draw the game
• Infinite damage to target player