Astral Dragon, Doubling Season, Mechanized Production, and Miirym, Sentinel Wyrm

Prerequisites

• Astral Dragon in hand
• Doubling Season on the battlefield
• Mechanized Production on the battlefield
• Miirym, Sentinel Wyrm on the battlefield
• You control a noncreature artifact
• available

Steps

1. Cast Astral Dragon by paying
2. Astral Dragon enters the battlefield, triggering itself and Miirym
3. Resolve the Miirym trigger, creating two token copies of Astral Dragon
4. The Astral Dragon tokens enter the battlefield, creating eight token copies of any noncreature artifact you control that are 3/3 Dragon creatures in addition to their other types
5. Resolve the Astral Dragon trigger from step 2, creating four token copies of any noncreature artifact you control that are 3/3 Dragon creatures in addition to their other types
6. At the beginning of your next upkeep, Mechanized Production triggers, creating a token copy of the artifact it is attached to and causing you to win the game

Results

• Near-infinite creature tokens
• Near-infinite ETB
• Win the game at the beginning of your next upkeep