Cast Slip On the Ring 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 Slip On the Ring 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 Slip On the Ring.
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 brilliant loop turns a simple blink spell into an unstoppable engine of creation and recursion. By casting Slip On the Ring to exile Abdel Adrian, Gorion's Ward, you trigger a cascade that brings back Mnemonic Wall, which immediately scoops Slip On the Ring right back out of your graveyard and into your hand. Meanwhile, Abdel Adrian's departure frees up everything else he was holding—including your mana-producing permanents—allowing you to tap them for the mana needed to recast the spell before his return triggers exile them all over again. The beauty of the system is how Abdel Adrian scales this continuous flicker into an army of 1/1 Soldier tokens while Mnemonic Wall endlessly recycles the lone instant you need to keep the gears turning.