Activate Mystic Sanctuary and Lavabrink Floodgates by tapping them, adding 2.
Cast Ghostly Flicker either from your hand or from the top of your library by paying 2, blinking Mystic Sanctuary and Lavabrink Floodgates.
When Mystic Sanctuary enters untapped, it triggers, putting Ghostly Flicker from your graveyard onto the top of your library.
Repeat.
This clever loop turns your mana sources into an endless engine by using Ghostly Flicker to repeatedly reset both Mystic Sanctuary and Lavabrink Floodgates. Every iteration lets Mystic Sanctuary's triggered ability place Ghostly Flicker right back on top of your library, while Lavabrink Floodgates pitches in the blue mana needed to pay for the spell again. With The Reality Chip set up to let you cast spells straight from the top of your library, you can effortlessly sustain this loop over and over.