Fractured Identity, Gather Specimens, and Dualcaster Mage

Prerequisites

• Fractured Identity in hand
• Gather Specimens in hand
• Dualcaster Mage in hand
• available

Steps

1. Cast Gather Specimens by paying , causing all creatures that would be created under an opponent's control this turn to be created under you control instead
2. Cast Fractured Identity by paying , targeting any permanent
3. Holding priority, cast Dualcaster Mage by paying
4. Dualcaster Mage enters the battlefield, creating a copy of Fractured Identity, targeting Dualcaster Mage
5. Resolve the copy of Fractured Identity, exiling Dualcaster Mage and creating a copy of Dualcaster Mage for each opponent you have
6. The Dualcaster Mage token(s) enter the battlefield, creating a copy of Fractured Identity targeting Dualcaster Mage, and any other instants and/or sorceries on the stack
7. Repeat from step 5
8. You may also have the additional triggers target permanents your opponent control to exile them and create token copies of them

Results

• Exile any number of nonland permanents
• Infinite copies of any instants and/or sorceries on the stack
• Infinite copies of any nonland permanents on the battlefield
• Infinite creature tokens
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers