Activate Sarkhan by paying {1}{U}, blinking it.
When Sarkhan enters the battlefield, it and Deadeye Navigator's soulbond ability trigger.
Resolve the Sarkhan trigger, choosing Goldspan Dragon and creating a Treasure token.
Resolve the Deadeye Navigator trigger, repairing it and Sarkhan.
Activate a Treasure by tapping and sacrificing it, adding {U}{U}.
Repeat.

Infinite creature LTB

Infinite creature ETB

Sarkhan, Dragon Ascendant

Goldspan Dragon

Deadeye Navigator

Activate Sarkhan by paying {1}{U}, blinking it.
When Sarkhan enters the battlefield, it and Deadeye Navigator's soulbond ability trigger.
Resolve the Sarkhan trigger, either choosing a Dragon you control or revealing a Dragon card from your hand and creating two Treasure tokens.
Resolve the Deadeye Navigator trigger, repairing it and Sarkhan.
Activate two Treasures by tapping and sacrificing them, adding {1}{U}.
Repeat.

Parallel Lives

Activate Sarkhan by paying {1}{U}, blinking it.
When Sarkhan enters the battlefield, it, Ganax and Deadeye Navigator's soulbond ability trigger.
Resolve the Sarkhan trigger, choosing Ganax and creating a Treasure token.
Resolve the Ganax trigger, creating a Treasure token.
Resolve the Deadeye Navigator trigger, repairing it and Sarkhan.
Activate two Treasures by tapping and sacrificing them, adding {1}{U}.
Repeat.

Combos with "Sarkhan, Dragon Ascendant"