Activate Ignis by paying {1}{U}, blinking it.
When Ignis enters, it and Deadeye Navigator's soulbond ability trigger.
Resolve the Deadeye Navigator trigger, repairing it and Ignis.
Resolve the Ignis trigger, causing you to look at the top six cards of your library and put a land card from among them onto the battlefield untapped due to Spelunking
If you put a land onto the battlefield this way, Tireless Provisioner triggers, creating a Treasure token. Activate the Treasure by tapping and sacrificing it, adding {U}.
Activate the land by tapping it, adding at least {1}.
Repeat.

Near-infinite ETB

Near-infinite landfall triggers

Near-infinite LTB

Ignis Scientia

Deadeye Navigator

Tireless Provisioner

Spelunking

Activate Ignis by paying {1}{U}, blinking it.
When Ignis enters, it and Deadeye Navigator's soulbond ability trigger.
Resolve the Deadeye Navigator trigger, repairing it and Ignis.
Resolve the Ignis trigger, causing you to look at the top six cards of your library and put a land card from among them onto the battlefield.
If you put a land onto the battlefield this way, Tireless Provisioner and Amulet of Vigor trigger.
Resolve the Tireless Provisioner trigger, creating a Treasure token. 
Activate the Treasure by tapping and sacrificing it, adding {U}.
Resolve the Amulet of Vigor trigger, untapping the land that entered
Activate the land by tapping it, adding at least {1}.
Repeat.

Combos with "Ignis Scientia"