Repercussion, Wrathful Raptors, and With Great Power...

Prerequisites

• Repercussion on the battlefield
• Wrathful Raptors on the battlefield
• With Great Power
• on the battlefield

Steps

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

Results

• Infinite damage