Spiteful Sliver, and Blazing Sunsteel

Prerequisites

• Spiteful Sliver on the battlefield
• Blazing Sunsteel on the battlefield

Steps

1. Deal damage to the Sliver with Blazing Sunsteel attached
2. The Sliver and Blazing Sunsteel trigger
3. Resolve the Sliver's trigger, dealing that much damage to an opponent
4. Resolve the Blazing Sunsteel trigger, dealing that much damage to the Sliver it is attached to
5. Repeat from step 2

Results

• Infinite damage