Mystic Sanctuary + Dust Bowl + Walk the Aeons + Ancient Greenwarden

Mystic Sanctuary

Dust Bowl

Walk the Aeons

Ancient Greenwarden

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 brilliant loop achieves near-infinite turns by recycling your extra-turn spells and lands right from the graveyard. The engine is anchored by Ancient Greenwarden, whose static ability lets you play lands from your graveyard and doubles land-based triggered abilities. This allows you to cast Walk the Aeons for its standard cost, sacrifice Mystic Sanctuary to Dust Bowl, and then replay Mystic Sanctuary from your graveyard. Because Ancient Greenwarden doubles the land's entry trigger, Mystic Sanctuary lets you pluck Walk the Aeons right back off the top of your library on your draw step, locking down the game in formats like Commander and Legacy.