Preston, the Vanisher + Fiend Hunter + Flickerwisp

Preston, the Vanisher

Fiend Hunter

Flickerwisp

How it works

1. Cast Flickerwisp by paying 1.
2. When Flickerwisp enters the battlefield, it triggers, exiling Fiend Hunter until the next end step.
3. When Fiend Hunter leaves the battlefield, its second ability triggers, returning all cards exiled with it to the battlefield under their owner's control.
4. At the beginning of your end step, Flickerwisp triggers, returning Fiend Hunter from exile to the battlefield.
5. When Fiend Hunter enters the battlefield, its first ability and Preston trigger.
6. Resolve the Fiend Hunter trigger, exiling Flickerwisp.
7. Resolve the Preston trigger, creating a copy of Fiend Hunter that is a 0/1 Illusion.
8. When the token Fiend Hunter enters the battlefield, its first ability triggers, exiling the nontoken Fiend Hunter until the token Fiend Hunter leaves the battlefield.
9. When the nontoken Fiend Hunter leaves the battlefield, its second ability triggers, returning Flickerwisp from exile to the battlefield.
10. When Flickerwisp enters the battlefield, it and Preston trigger, with Flickerwisp targeting the Fiend Hunter token.
11. Resolve the Preston trigger, creating a token copy of Flickerwisp that is a 0/1 Illusion.
12. When the token Flickerwisp enters the battlefield, it triggers, exiling the Fiend Hunter token.
13. When the token Fiend Hunter leaves the battlefield, its second ability triggers, returning the nontoken Fiend Hunter from exile to the battlefield.
14. Repeat from step 5.

This intricate loop turns Preston, the Vanisher into an illusionary forge by leveraging the unique mechanics of creatures entering the battlefield without being cast. Because neither Flickerwisp nor Fiend Hunter enters from hand, Preston's static-triggered ability steps in to continually spit out 0/1 copies whenever they reappear. Fiend Hunter provides the continuous target-exile engine that disrupts and resets the board, while Flickerwisp acts as the timing catalyst that kicks the whole recursive cycle into gear during the end step.