Abdel Adrian enters the battlefield, exiling Spark Double until Abdel Adrian leaves the battlefield, and creating a 1/1 Soldier creature token.
Spark Double leaves the battlefield, triggering its second ability, returning Wormfang Drake from exile to the battlefield.
Wormfang Drake enters the battlefield, triggering its first ability, exiling Abdel Adrian.
Abdel Adrian leaves the battlefield, returning Spark Double from exile to the battlefield as a copy of Wormfang Drake.
Spark Double enters the battlefield, triggering its first ability, exiling Wormfang Drake.
Wormfang Drake leaves the battlefield, triggering its second ability, returning Abdel Adrian from exile to the battlefield.
Repeat from step 2.
This delightful loop relies on Spark Double entering as a copy of Wormfang Drake while shedding its legendary status, creating a perpetual motion machine with Abdel Adrian, Gorion's Ward. Every time Abdel Adrian leaves the battlefield to fuel Wormfang Drake's sacrifice trigger, Spark Double (masquerading as another Drake) blinks Abdel right back alongside any other nonland permanents you wish to bring along for the ride. The original Wormfang Drake acts as the catalyst to kickstart the sequence, ensuring that Abdel Adrian, Gorion's Ward and Spark Double bounce back and forth indefinitely. As they continuously re-enter, you flood the board with an endless army of Soldier tokens while infinitely repeating every associated "enters" and "leaves the battlefield" trigger.