When Lumbering Battlement enters the battlefield, it triggers, exiling Abdel Adrian until Lumbering Battlement leaves the battlefield.
Abdel Adrian leaves the battlefield, ending its effect, causing Clever Impersonator to return from exile to the battlefield as a copy of Lumbering Battlement.
When Clever Impersonator enters the battlefield, it triggers, exiling Lumbering Battlement until Clever Impersonator leaves the battlefield.
Lumbering Battlement 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 Clever Impersonator 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.
Clever Impersonator leaves the battlefield, ending its effect, causing Lumbering Battlement to return to the battlefield from exile.
Repeat from step 2.
Results
Infinite blinking of nonland permanents you control.