Astral Dragon, and Cursed Mirror

Prerequisites

• Astral Dragon in hand
• Cursed Mirror on the battlefield
• Cursed Mirror cannot be copying a creature
• available

Steps

1. Cast Astral Dragon by paying
2. Astral Dragon enters the battlefield, creating two token copies of Cursed Mirror that are 3/3 Dragons in addition to their other types
3. Choose to have the Cursed Mirror tokens enter the battlefield as copies of Astral Dragon
4. The Cursed Mirror tokens enter the battlefield, triggering their abilities
5. Resolve the first Cursed Mirror trigger, creating two token copies of any applicable permanent that are 3/3 Dragons in addition to their other colors and types
6. Resolve the second Cursed Mirror trigger, creating two token copies of the nontoken Cursed Mirror that are 3/3 Dragons in addition to their other types
7. Repeat from step 3

Results

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