Blazing Sunsteel, and Barbed Servitor

Prerequisites

• Blazing Sunsteel on the battlefield
• Barbed Servitor on the battlefield

Steps

1. Deal damage to Barbed Servitor Barbed Servitor and Blazing Sunsteel trigger
2. Resolve the Barbed Servitor trigger, causing an opponent to lose life equal to the damage dealt to it Resolve the Blazing Sunsteel trigger, dealing damage to Barbed Servitor
3. Repeat from step 2

Results

• Infinite lifeloss