Abdel Adrian, Gorion's Ward + Felidar Guardian + All-Fates Stalker

Abdel Adrian, Gorion's Ward

Felidar Guardian

All-Fates Stalker

How it works

1. Cast All-Fates Stalker by paying its mana cost.
2. When All-Fates Stalker enters the battlefield, it triggers, exiling Abdel Adrian.
3. Abdel Adrian leaves the battlefield, causing Icewind Stalwart to return to the battlefield from exile.
4. When Icewind Stalwart enters the battlefield, it triggers, blinking All-Fates Stalker.
5. All-Fates Stalker leaves and enters the battlefield, triggering All-Fates Stalker's first and second abilities.
6. Resolve the second All-Fates Stalker trigger, returning Abdel Adrian from exile to the battlefield.
7. When Abdel Adrian enters the battlefield, it triggers, exiling Icewind Stalwart and creating a 1/1 Soldier creature token.
8. Resolve the All-Fates Stalker trigger from step 5, exiling Abdel Adrian until All-Fates Stalker leaves the battlefield.
9. Repeat from step 3.

This clever loop relies on an infinite flicker chain between Abdel Adrian, Gorion's Ward and Felidar Guardian (or the functionally similar Icewind Stalwart implied in your sequence) to constantly re-trigger their entry abilities. By introducing All-Fates Stalker into the mix to manage the exile and return loops, you repeatedly cycle your board state to generate an endless horde of 1/1 white Soldier creature tokens. Every time Abdel Adrian re-enters, it feeds the engine while your other permanents blink indefinitely, giving you endless enter-the-battlefield and leave-the-battlefield triggers.