Abdel Adrian enters the battlefield, exiling Glasspool Mimic until Abdel Adrian leaves the battlefield, and creating a 1/1 Soldier creature token.
Glasspool Mimic leaves the battlefield, triggering its second ability, returning Fiend Hunter from exile to the battlefield.
Fiend Hunter enters the battlefield, triggering its first ability, exiling Abdel Adrian.
Abdel Adrian leaves the battlefield, returning Glasspool Mimic from exile to the battlefield as a copy of Fiend Hunter.
Glasspool Mimic enters the battlefield, triggering its first ability, exiling Fiend Hunter.
Fiend Hunter leaves the battlefield, triggering its second ability, returning Abdel Adrian from exile to the battlefield.
Repeat from step 2.
This elegant loop relies on an infinite relay race of exiling and returning between Abdel Adrian, Gorion's Ward and Fiend Hunter, using Glasspool Mimic as a chameleon copy to keep the chain unbroken. As Abdel Adrian enters the battlefield, he initially swallows up the Mimic, which triggers a cascading rescue mission that drops Fiend Hunter back into play to temporarily exile Abdel Adrian in turn. This momentary departure causes the Mimic to re-enter the battlefield as a fresh copy of Fiend Hunter, restarting the cycle with zero outside mana required. The result is a perpetual motion machine that generates infinite creature tokens and endless entry triggers from your entire team.