Time Sieve + Academy Manufactor + Parallel Lives + Tireless Tracker + Boros Garrison

Time Sieve

Academy Manufactor

Parallel Lives

Tireless Tracker

Boros Garrison

How it works

1. Play Boros Garrison.
2. When Boros Garrison enters, it and Tireless Tracker trigger
3. Resolve the Boros Garrison 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 Parallel Lives.
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.