Abdel Adrian, Gorion's Ward + Eternal Witness + Another Round

Abdel Adrian, Gorion's Ward

Eternal Witness

Another Round

How it works

1. Cast Another Round by paying its mana cost, blinking Abdel Adrian.
2. Abdel Adrian leaves the battlefield, returning Eternal Witness and all other cards that were exiled with it to the battlefield.
3. Abdel Adrian and Eternal Witness trigger.
4. Resolve the Eternal Witness trigger, returning Another Round from your graveyard to your hand.
5. Holding priority, activate any number of nonland permanents you control by tapping them, adding at least enough mana to cast Another Round.
6. Resolve the Abdel Adrian trigger, exiling Eternal Witness 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.
7. Repeat.

This loop turns a simple spell into an engine of endless iteration by leveraging Abdel Adrian, Gorion's Ward to continuously reset the board. When you cast Another Round, it blinks Abdel Adrian, which triggers its enters-the-battlefield ability to swallow up Eternal Witness alongside your other mana-producing permanents, leaving behind a growing army of 1/1 Soldier tokens. Meanwhile, Eternal Witness triggers upon its return to scoop Another Round right back into your hand, ready to be recast. Because Abdel Adrian's exile effect also temporarily holds your mana sources, you simply tap them for mana before they vanish into the blink, fueling the next repetition of Another Round while generating infinite triggers and tokens along the way.