Grim Hireling, Time Sieve, and Academy Manufactor

Prerequisites

• Grim Hireling on the battlefield
• Time Sieve on the battlefield
• Academy Manufactor on the battlefield
• You control a creature that does not have summoning sickness and cannot be blocked by at least one opponent

Steps

1. Attack with a creatue you control
2. When that creature deals combat damage to an opponent, Grim Hireling triggers
3. Resolve the Grim Hireling trigger, creating two Treasure tokens, two Food tokens, and two Clue tokens
4. Activate Time Sieve by sacrificing five of the created artifacts and tapping it to take an extra turn
5. Pass the turn
6. Repeat

Results

• Infinite turns