Activate Jewel Thief by paying {1}{U}, blinking it.
When Jewel Thief enters, it and Deadeye Navigator's soulbond ability trigger twice.
Resolve both Deadeye Navigator triggers, repairing it and Jewel Thief.
Resolve both Jewel Thief triggers, creating two Treasure tokens.
Activate both Treasures by tapping and sacrificing them, adding {1}{U}.
Repeat.

Infinite artifact ETB

Infinite artifact LTB

Infinite artifact sacrifice triggers

Infinite creature LTB

Infinite creature ETB

Deadeye Navigator

Jewel Thief

Panharmonicon

Activate Jewel Thief by paying {1}{U}, blinking it.
When Jewel Thief enters, it and Deadeye Navigator's soulbond ability trigger
Resolve the Deadeye Navigator trigger, repairing it and Jewel Thief.
Resolve the Jewel Thief trigger, creating two Treasure tokens.
Activate both Treasures by tapping and sacrificing them, adding {1}{U}.
Repeat.

Adrix and Nev, Twincasters

Activate Emiel the Blessed by paying {3}, blinking Jewel Thief.
When Jewel Thief enters the battlefield, it triggers once, and Preston triggers twice.
Resolve the Jewel Thief trigger, creating a Treasure token.
Resolve the first Preston trigger, creating a token copy of Jewel Thief that is a 0/1 Illusion.
When the Jewel Thief token enters the battlefield, it triggers, creating a Treasure token.
Repeat from step 4 for the remaining Preston trigger.
Activate three Treasures by tapping and sacrificing them, adding {3}.
Repeat.

Infinite creature tokens

Emiel the Blessed

Preston, the Vanisher

Delney, Streetwise Lookout

Activate Emiel the Blessed by paying {1}, blinking Jewel Thief.
When Jewel Thief enters the battlefield, it triggers, creating a Treasure artifact token.
Activate the Treasure by tapping and sacrificing it, adding {1}.
Repeat.

Biomancer's Familiar

Activate Emiel by paying {3}, blinking Jewel Thief.
Jewel Thief enters the battlefield, creating a Food, a Clue, and a Treasure token.
Activate the Food, Clue and Treasure tokens by tapping them, adding {G}{G}{G}.
Repeat.

Combos with "Jewel Thief"