Hoard Robber + Time Sieve + Academy Manufactor + Mirror Image

Hoard Robber

Time Sieve

Academy Manufactor

Mirror Image

How it works

1. Attack with Hoard Robber.
2. Hoard Robber triggers on combat damage to a player, creating three Treasure tokens, three Food tokens, and three Clue tokens.
3. Activate Time Sieve's ability by tapping Time Sieve and sacrificing five artifacts you control, taking an extra turn after this one.
4. Repeat.