This clever loop turns Zirda, the Dawnwaker's cost-reducing presence into a nearly-free engine, reducing Emiel the Blessed's blink activation from three mana down to just a single generic mana. With Emiel's ability discounted, you can repeatedly exile Plundering Barbarian and let it re-enter the battlefield, triggering its ability to generate a Treasure token each time. You then crack that very same Treasure for mana to pay for Emiel the Blessed's discounted blink, fueling an endless cycle that generates infinite creature leaves-the-battlefield and enters-the-battlefield triggers.