Mystic Sanctuary + Dust Bowl + Crucible of Worlds + Time Walk

Mystic Sanctuary

Dust Bowl

Crucible of Worlds

Time Walk

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.

By looping Time Walk, you can take endless consecutive turns to completely lock your opponent out of the game. The engine relies on Crucible of Worlds to let you constantly replay lands from your graveyard, specifically allowing you to redeploy Mystic Sanctuary over and over. Each time Mystic Sanctuary enters the battlefield untapped, its triggered ability puts Time Walk right back on top of your library to be drawn on your next turn. Finally, Dust Bowl provides a reliable way to sacrifice Mystic Sanctuary into the graveyard so the whole cycle can begin again.