Fiendlash, Truefire Captain, and Pariah's Shield

Prerequisites

• Fiendlash on the battlefield
• Truefire Captain on the battlefield
• Pariah's Shield on the battlefield

Steps

1. Deal damage to Truefire Captain
2. Truefire Captain and Fiendlash trigger
3. Resolve the Truefire Captain trigger, dealing damage to an applicable target
4. Resolve the Fiendlash trigger, targeting you, but dealing damage to Truefire Captain instead due to Pariah's Shield
5. Repeat from step 2

Results

• Infinite damage to target player