Blazing Sunsteel, and Mirage Mirror

Prerequisites

• Blazing Sunsteel on the battlefield
• Mirage Mirror on the battlefield
• Blazing Sunsteel attached to an indestructible creature you control
• You have a way to deal damage to the indestructible creature
• available

Steps

1. Activate Mirage Mirror by paying , causing it to become a copy of Blazing Sunsteel until end of turn
2. Activate Mirage Mirror's equip ability by paying , attaching it to the indestructible creature with Blazing Sunsteel attached
3. Deal damage to the indestructible creature
4. Blazing Sunsteel and Mirage Mirror trigger
5. Resolve the Blazing Sunsteel trigger, dealing damage equal to the damage dealt to any target
6. Resolve the Mirage Mirror trigger, dealing damage equal to the damage dealt to the indestructible creature
7. Repeat from step 2

Results

• Infinite damage