Extravagant Replication + Time Walk + Revolutionist

Extravagant Replication

Time Walk

Revolutionist

How it works

1. Cast Time Walk 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 Revolutionist.
4. When the Revolutionist token enters the battlefield, it triggers, returning Time Walk from your graveyard to your hand.
5. Repeat.

This vintage-legal engine achieves infinite turns by using Extravagant Replication to continuously forge fresh copies of Revolutionist during your upkeep. Each time a new Revolutionist token materializes, its entry trigger reaches into your graveyard to fish back Time Walk, which you then cast to take yet another turn and keep the loop spinning endlessly.