Time Sieve + Academy Manufactor + Golgari Rot Farm + Tireless Tracker + Elspeth, Storm Slayer

Time Sieve

Academy Manufactor

Golgari Rot Farm

Tireless Tracker

Elspeth, Storm Slayer

How it works

1. Play Golgari Rot Farm.
2. When Golgari Rot Farm enters, it and Tireless Tracker trigger
3. Resolve the Golgari Rot Farm trigger, returning it from the battlefield to your hand.
4. Resolve the Tireless Tracker trigger, creating two Treasure, two Clue and two Food artifact tokens due to Academy Manufactor and Elspeth, Storm Slayer.
5. Activate Time Sieve by tapping it and sacrificing five of the artifact tokens, causing you to take an extra turn after this one.
6. Repeat each turn.