Miirym, Sentinel Wyrm, Astral Dragon, and Primal Vigor

Prerequisites

• Miirym, Sentinel Wyrm on the battlefield
• Astral Dragon in hand
• Primal Vigor on the battlefield
• available

Steps

1. Cast Astral Dragon by paying
2. Astral Dragon enters the battlefield, triggering itself and Miirym
3. Resolve the Astral Dragon trigger, creating four token copies of Primal Vigor that are 3/3 Dragons in addition to their other types
4. Resolve the Miirym trigger, creating a total of 32 Astral Dragon tokens
5. The Astral Dragon tokens enter the battlefield, creating an extremely large number of Primal Vigor tokens that are 3/3 Dragons in addition to their other types

Results

• Near-infinite creature tokens
• Near-infinite ETB