Panoptic Mirror, Strionic Resonator, Ghostly Flicker, and Cabal Stronghold

Prerequisites

• Panoptic Mirror on the battlefield
• Strionic Resonator on the battlefield
• Ghostly Flicker in exile
• Cabal Stronghold on the battlefield
• undefined available

Steps

1. At the beginning of your upkeep, Panoptic Mirror triggers
2. Holding priority, activate Cabal Stronghold's second ability by paying and tapping it, adding at least
3. Activate Strionic Resonator 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 Cabal Stronghold and Strionic Resonator
6. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite storm count
• Infinite magecraft triggers
• Infinite black mana
• Infinite landfall triggers
• Infinite blinking of permanents you control
• Infinite mana permanents you control that enter the battlefield untapped can produce