Mystic Sanctuary + Dust Bowl + Walk the Aeons + Conduit of Worlds

Mystic Sanctuary

Dust Bowl

Walk the Aeons

Conduit of Worlds

How it works

1. Cast Walk the Aeons 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 Walk the Aeons from your graveyard onto the top of your library.
5. Move to your next turn, drawing Walk the Aeons during your draw step.
6. Repeat.

This elegant loop achieves near-infinite turns by continually recycling a single extra-turn spell right back into your hand. You cast Walk the Aeons to secure your next turn, but instead of losing your lands to its buyback cost, you let Dust Bowl sacrifice Mystic Sanctuary after it has already served its purpose. Thanks to Conduit of Worlds letting you play lands from your graveyard, you simply replay Mystic Sanctuary, whose triggered ability smoothly tucks Walk the Aeons from your graveyard back onto the top of your library just in time for your next draw step.