Cast Abdel Adrian from the command zone by paying 4 and command tax, if applicable.
Abdel Adrian enters the battlefield, exiling Felidar Guardian and creating a 1/1 Soldier creature token.
Cast Ephemerate by paying , blinking Abdel Adrian.
Abdel Adrian leaves and enters the battlefield, causing Felidar Guardian to return to the battlefield from exile, and triggering Abdel Adrian and Felidar Guardian's enters-the-battlefield ability.
Resolve the Abdel Adrian trigger, exiling Felidar Guardian and creating a 1/1 Soldier creature token.
Resolve the Felidar Guardian trigger, blinking Abdel Adrian.
Repeat from step 4.
This clever loop turns a simple blink spell into an unstoppable engine by exploiting the constant cycle of entries and exits between Abdel Adrian, Gorion's Ward and Felidar Guardian. When you cast Ephemerate to jump-start the process, Abdel Adrian's entry triggers to swallow Felidar Guardian whole, which in turn triggers Felidar Guardian to bounce Abdel Adrian right back out. Every single iteration of this bouncing pair feeds Abdel Adrian, Gorion's Ward's first ability to continuously harvest nonland permanents and flood the board with an endless army of 1/1 Soldier tokens.