Hoard Robber, Time Sieve, Academy Manufactor, and Doubling Season

Prerequisites

• Hoard Robber on the battlefield
• Time Sieve on the battlefield
• Academy Manufactor on the battlefield
• Doubling Season on the battlefield
• Hoard Robber does not have summoning sickness and cannot be blocked by at least one opponent

Steps

1. Attack with Hoard Robber
2. Hoard Robber triggers on combat damage to a player, creating two Treasure tokens, two Food tokens, and two 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

Results

• Infinite turns