Mystic Sanctuary + Dust Bowl + Time Walk + Ramunap Excavator

Mystic Sanctuary

Dust Bowl

Time Walk

Ramunap Excavator

How it works

1. Cast Time Walk by paying its mana cost, causing you to take an extra turn after this one.
2. Activate Dust Bowl by paying 3, tapping it and sacrificing Mystic Sanctuary, destroying a nonbasic land.
3. Play Mystic Sanctuary from your graveyard.
4. When Mystic Sanctuary enters untapped, it triggers, putting Time Walk from your graveyard onto the top of your library.
5. Move to your next turn, drawing Time Walk during your draw step.
6. Repeat.

This elegant loop gives you near-infinite turns by endlessly recycling Time Walk right back to the top of your library. The engine is powered by Ramunap Excavator, which lets you repeatedly play Mystic Sanctuary directly out of your graveyard. Because Dust Bowl provides a reliable way to sacrifice Mystic Sanctuary every single turn, you can constantly trigger the land's ability to fetch Time Walk while simultaneously tearing apart opposing nonbasic lands.