Astral Dragon, and Oblivion Ring

Prerequisites

• Astral Dragon in hand
• Oblivion Ring on the battlefield
• available

Steps

1. Cast Astral Dragon by paying
2. Astral Dragon enters the battlefield, creating two token copies of Oblivion Ring that are 3/3 Dragons in addition to their other types
3. The Oblivion Ring tokens enter the battlefield, triggering their first abilities
4. Resolve the first Oblivion Ring token's trigger, exiling Astral Dragon
5. Resolve the second Oblivion Ring token's trigger, exiling the first Oblivion Ring token
6. The first Oblivion Ring token leaves the battlefield, returning Astral Dragon from exile to the battlefield
7. Repeat from step 2

Results

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