Time Sieve + Academy Manufactor + Tireless Tracker + Rakdos Carnarium + Exalted Sunborn

Time Sieve

Academy Manufactor

Tireless Tracker

Rakdos Carnarium

Exalted Sunborn

How it works

1. Play Rakdos Carnarium.
2. When Rakdos Carnarium enters, it and Tireless Tracker trigger
3. Resolve the Rakdos Carnarium 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 Exalted Sunborn.
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.