Hoard Robber + Time Sieve + Academy Manufactor + Helm of the Host

Hoard Robber

Time Sieve

Academy Manufactor

Helm of the Host

How it works

1. At the beginning of your combat step, Helm of the Host triggers, creating a token copy of Academy Manufactor.
2. Attack with Hoard Robber.
3. Hoard Robber triggers on combat damage to a player, creating three Treasure tokens, three Food tokens, and three Clue tokens.
4. Activate Time Sieve's ability by tapping Time Sieve and sacrificing five artifacts you control, taking an extra turn after this one.
5. Repeat.