Panoptic Mirror, Lithoform Engine, Ghostly Flicker, and Sol Ring

Prerequisites

• Panoptic Mirror on the battlefield
• Lithoform Engine on the battlefield
• Ghostly Flicker in exile
• Sol Ring on the battlefield

Steps

1. At the beginning of your upkeep, Panoptic Mirror triggers
2. Holding priority, activate Sol Ring by tapping it, adding
3. Activate Lithoform Engine's first ability by paying and tapping it, copying Panoptic Mirror's trigger
4. Resolve the copy of Panoptic Mirror's trigger, casting a copy of Ghostly Flicker without paying its mana cost
5. Resolve the copy of Ghostly Flicker, blinking Sol Ring and Lithoform Engine
6. Repeat from step 2

Results

• Infinite storm count
• Infinite magecraft triggers