Extravagant Replication + Walk the Aeons + Timeless Witness

Extravagant Replication

Walk the Aeons

Timeless Witness

How it works

1. Cast Walk the Aeons by paying its mana cost, causing you to take an extra turn after this one.
2. Move to your next turn.
3. At the beginning of your upkeep, Extravagant Replication triggers, creating a token copy of Timeless Witness.
4. When the Timeless Witness token enters the battlefield, it triggers, returning Walk the Aeons from your graveyard to your hand.
5. Repeat.

This clever engine locks down the game by establishing a recursive loop of extra turns, all fueled by the upkeep trigger of Extravagant Replication. Each cycle, Extravagant Replication creates a fresh token copy of Timeless Witness, whose enters-the-battlefield ability immediately plucks Walk the Aeons right back out of your graveyard and into your hand. You then simply cast Walk the Aeons again to secure another turn, maintaining the endless sequence without ever running out of resources.