Fiend Hunter, and Dual Nature

Prerequisites

• Fiend Hunter in hand
• Dual Nature on the battlefield
• available

Steps

1. Cast Fiend Hunter by paying
2. Fiend Hunter enters the battlefield, triggering itself and Dual Nature's first ability
3. Resolve the Fiend Hunter trigger, choosing not to exile anything
4. Resolve the Dual Nature trigger, creating a token copy of Fiend Hunter
5. The token Fiend Hunter enters the battlefield, exiling the nontoken Fiend Hunter
6. Fiend Hunter leaves the battlefield, triggering Dual Nature's second ability, exiling the Fiend Hunter token
7. The Fiend Hunter token leaves the battlefield, triggering its second ability, returning the nontoken Fiend Hunter from exile to the battlefield
8. Repeat from step 2

Results

• Exile any number of creatures your opponents control
• Infinite blinking
• Infinite ETB
• Infinite LTB