Cast Flicker by paying its mana cost, blinking Abdel Adrian.
Abdel Adrian leaves the battlefield, returning Possessed Skaab and all other cards that were exiled with it to the battlefield.
Abdel Adrian and Possessed Skaab trigger.
Resolve the Possessed Skaab trigger, returning Flicker from your graveyard to your hand.
Holding priority, activate any number of nonland permanents you control by tapping them, adding at least enough mana to cast Flicker.
Resolve the Abdel Adrian trigger, exiling Possessed Skaab and the mana-producing permanents until Abdel Adrian leaves the battlefield, and creating a 1/1 Soldier creature token for each permanent exiled this way.
Repeat.
This cunning loop uses Abdel Adrian, Gorion's Ward as a recursive blink engine, casting Flicker to repeatedly cycle Abdel in and out of exile. Each time Abdel re-enters, his triggered ability swallows up Possessed Skaab along with any mana-producing permanents you control, leaving behind an army of Soldier tokens while setting up the next iteration. Meanwhile, Possessed Skaab does the heavy lifting from the graveyard by returning Flicker straight to your hand when it enters the battlefield. Because Possessed Skaab's replacement effect exiles it instead of letting it die, it never gets truly lost to the bin, keeping this endless engine of mana, tokens, and triggers running smoothly.