Panoptic Mirror | Lithoform Engine | Ghostly Flicker (and one other card)

Cards

At the beginning of your upkeep,
Panoptic Mirror triggers.
Holding priority, activate
Sisay's Ring by tapping it, adding ({C} magic symbol) ({C} magic symbol) .
Activate
Lithoform Engine's first ability by paying ({2} magic symbol) and tapping it, copying
Panoptic Mirror's trigger.
Resolve the copy of
Panoptic Mirror's trigger, casting a copy of
Ghostly Flicker without paying its mana cost.
Resolve the copy of
Ghostly Flicker, blinking
Sisay's Ring and
Lithoform Engine.
Repeat from step 2.

This combo has been estimated to be Powerful (Bracket 3+).