When Phantom Steed enters the battlefield, its first ability triggers, exiling Abdel Adrian until Phantom Steed leaves the battlefield.
Abdel Adrian leaves the battlefield, ending its effect, causing Sakashima of a Thousand Faces to return from exile to the battlefield as a copy of Phantom Steed.
When Sakashima of a Thousand Faces enters the battlefield, its first ability triggers, exiling Phantom Steed until Sakashima of a Thousand Faces leaves the battlefield.
Phantom Steed leaves the battlefield, ending its effect, causing Abdel Adrian to return from exile to the battlefield.
When Abdel Adrian enters the battlefield, it triggers, exiling Sakashima of a Thousand Faces and any number of other nonland permanents you control until Abdel Adrian leaves the battlefield and creating at least one 1/1 Soldier creature token.
Sakashima of a Thousand Faces leaves the battlefield, ending its effect, causing Phantom Steed to return to the battlefield from exile.
Repeat from step 2.
Results
Infinite blinking of nonland permanents you control.