Repercussion, Frilled Deathspitter, and With Great Power...

Prerequisites

• Repercussion on the battlefield
• Frilled Deathspitter on the battlefield
• With Great Power
• on the battlefield

Steps

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

Results

• Infinite damage to target opponent