Panoptic Mirror + Strionic Resonator + Ghostly Flicker + Mana Crypt

Panoptic Mirror

Strionic Resonator

Ghostly Flicker

Mana Crypt

How it works

1. At the beginning of your upkeep, Panoptic Mirror triggers.
2. Holding priority, activate Mana Crypt by tapping it, adding CC.
3. Activate Strionic Resonator 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 Mana Crypt and Strionic Resonator.
6. Repeat from step 2.