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

Time Sieve

Academy Manufactor

Golgari Rot Farm

Tireless Provisioner

Elspeth, Storm Slayer

How it works

1. Play Golgari Rot Farm.
2. When Golgari Rot Farm enters, it and Tireless Provisioner trigger
3. Resolve the Golgari Rot Farm trigger, returning it from the battlefield to your hand.
4. Resolve the Tireless Provisioner 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.