Astral Dragon, Swift Reconfiguration, and Lithoform Engine

Prerequisites

• Astral Dragon in hand
• Swift Reconfiguration in hand
• Lithoform Engine on the battlefield
• available

Steps

1. Cast Astral Dragon by paying
2. When Astral Dragon enters the battlefield, its ability triggers
3. Holding priority, cast Swift Reconfiguration by paying , attaching it to Astral Dragon and causing Astral Dragon to become a Vehicle artifact with no other card types
4. Activate Lithoform Engine's first ability by paying and tapping it, copying Astral Dragon's trigger from step 2, targeting Astral Dragon
5. Resolve the copy of Astral Dragon's ability, creating two token copies of Astral Dragon that are 3/3 Dragons in addition to their other types
6. When the Astral Dragon tokens enter the battlefield, their abilities trigger, targeting the nontoken Astral Dragon
7. Resolve the first Astral Dragon token's trigger, creating two token copies of Astral Dragon that are 3/3 Dragons in addition to their other types
8. Repeat from step 6

Results

• Infinite copies of noncreature permanents you control
• Infinite creature tokens
• Infinite ETB