Cast Ghostly Flicker by paying its mana cost, blinking Abdel Adrian.
Abdel Adrian leaves the battlefield, returning Mnemonic Wall and all other cards that were exiled with it to the battlefield.
Abdel Adrian and Mnemonic Wall trigger.
Resolve the Mnemonic Wall trigger, returning Ghostly 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 Ghostly Flicker.
Resolve the Abdel Adrian trigger, exiling Mnemonic Wall 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 elegant loop turns a simple blink spell into a recursive engine by leveraging Abdel Adrian, Gorion's Ward to continuously swallow and re-release your board. Every time Ghostly Flicker targets Abdel Adrian and another eligible permanent, Mnemonic Wall enters right alongside him to fish the spell right back out of your graveyard. This seamless cycle not only buries your opponents under an endless tide of 1/1 Soldier creature tokens, but also lets you continuously tap any other mana-producing permanents swept up in Abdel's exile trigger to keep the mana flowing indefinitely.