Turnabout + Ghostly Flicker + Revolutionist + Zealous Lorecaster

Turnabout

Ghostly Flicker

Revolutionist

Zealous Lorecaster

How it works

1. Activate any number of lands you control by tapping them, adding at least 4.
2. Cast Turnabout by paying 2, untapping all lands you control.
3. Cast Ghostly Flicker by paying 2, blinking Revolutionist and Zealous Lorecaster.
4. When Revolutionist and Zealous Lorecaster enter the battlefield, they trigger, returning Turnabout and Ghostly Flicker from your graveyard to your hand.
5. Repeat.

This clever mana-positive loop centers around Ghostly Flicker, which perpetually resets Revolutionist and Zealous Lorecaster by exiling and returning them to the battlefield. Each time both creatures enter the battlefield, their triggered abilities fire off to reclaim your spent spells, bringing back Turnabout and Ghostly Flicker from your graveyard directly to your hand. Meanwhile, Turnabout serves as the engine's powerhouse, using its untap mode to refresh all of your lands so you can continuously fund the mana costs to cast your spells over and over again.