Activate Charming Scoundrel by paying 1, blinking it.
When Charming Scoundrel enters the battlefield, it and Deadeye Navigator's soulbond ability trigger twice.
Resolve both Deadeye Navigator triggers, repairing it and Charming Scoundrel.
Resolve both Charming Scoundrel triggers, creating two Treasure artifact tokens.
Activate the Treasures by tapping and sacrificing them, adding .
Repeat.
This loop transforms Deadeye Navigator and Charming Scoundrel into a self-sustaining engine by leveraging the doubling power of Elesh Norn, Mother of Machines. When Charming Scoundrel enters the battlefield, Elesh Norn ensures its entry triggers twice rather than once, yielding a pair of Treasure tokens that refund the mana needed to activate Deadeye Navigator's blink ability. By repeatedly exiling and returning Charming Scoundrel to the battlefield, you continuously re-trigger its soulbond pairing with Deadeye Navigator while flooding the board with endless artifacts and triggers.