Walk the Aeons + Mystic Sanctuary + Crucible of Worlds + Ghirapur Orrery

Walk the Aeons

Mystic Sanctuary

Crucible of Worlds

Ghirapur Orrery

How it works

1. Cast Walk the Aeons by paying 4, sacrificing Mystic Sanctuary and two other Islands, causing you to take an extra turn after this one and returning Walk the Aeons to your hand.
2. Play any Island except Mystic Sanctuary from your graveyard.
3. Move to your next turn.
4. Cast Walk the Aeons by paying 4, causing you to take an extra turn after this one.
5. Play any Island except Mystic Sanctuary from your graveyard, then play Mystic Sanctuary from your graveyard.
6. When Mystic Sanctuary enters the battlefield, it triggers, putting Walk the Aeons on top of your library from your graveyard.
7. Move to your next turn, drawing Walk the Aeons during your draw step.
8. Repeat.

This clever extra-turn loop harnesses the power of buyback on Walk the Aeons to chain infinite turns together, using Crucible of Worlds to let you continuously replay lands from your graveyard. Because Crucible of Worlds lets you play lands from your graveyard, you can recur Mystic Sanctuary to the battlefield, triggering its ability to place Walk the Aeons right back on top of your library where you can draw it. Ghirapur Orrery keeps your engine running by granting you an additional land drop on each of your turns, while Mystic Sanctuary's entry condition relies on you controlling enough other Islands to ensure it enters untapped and ready to fetch your spell.