Panoptic Mirror + Lithoform Engine + Ghostly Flicker + Sol Ring

How it works

1. At the beginning of your upkeep, Panoptic Mirror triggers.
2. Holding priority, activate Sol Ring by tapping it, adding CC.
3. Activate Lithoform Engine's first ability by paying 2 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.