Blazing Sunsteel, and Frilled Deathspitter

Prerequisites

• Blazing Sunsteel on the battlefield
• Frilled Deathspitter on the battlefield

Steps

1. Deal damage to Frilled Deathspitter
2. Frilled Deathspitter and Blazing Sunsteel trigger
3. Resolve the Frilled Deathspitter trigger, dealing damage to any opponent Resolve the Blazing Sunsteel trigger, dealing damage to Frilled Deathspitter
4. Repeat from step 2

Results

• Infinite damage