Turnabout + Ghostly Flicker + Returned Pastcaller + Donnie & April, Adorkable Duo

Turnabout

Ghostly Flicker

Returned Pastcaller

Donnie & April, Adorkable Duo

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 Donnie & April and Returned Pastcaller.
4. When Donnie & April and Returned Pastcaller enter the battlefield, they trigger, returning Turnabout and Ghostly Flicker from your graveyard to your hand.
5. Repeat.

This elegant loop centers on the relentless recursion provided by Ghostly Flicker, which repeatedly resets Donnie & April, Adorkable Duo and Returned Pastcaller to harvest instant and sorcery spells from your graveyard. As those two creatures blink in and out of play, their enters-the-battlefield abilities seamlessly pull Ghostly Flicker and Turnabout right back to your hand. Meanwhile, Turnabout does the heavy lifting of fueling the mana engine by untapping your lands every single iteration, leaving you with infinite mana and endless triggers to overwhelm the table.