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

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Galazeth Prismari

Deadeye Navigator

Goldspan Dragon

Activate Galazeth Prismari by paying {1}{U}, blinking it.
When Galazeth Prismari enters, it and Deadeye Navigator's soulbond ability trigger twice.
Resolve both Deadeye Navigator triggers, repairing it and Galazeth Prismari.
Resolve both Galazeth Prismari 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

Panharmonicon

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

Xorn

Activate Ashnod's Altar by sacrificing Galazeth Prismari, adding {C}{C}.
Galazeth Prismari dies, triggering Nim Deathmantle, causing you to pay {4} to return Galazeth Prismari from your graveyard to the battlefield, and attach Nim Deathmantle to it.
Galazeth Prismari enters the battlefield, creating two Treasure tokens.
Activate two Treasure tokens by tapping and sacrificing those, adding two mana of any color.
Repeat.

Nim Deathmantle

Ashnod's Altar

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

Emiel the Blessed

Zirda, the Dawnwaker

Activate Emiel the Blessed by paying {3}, blinking Galazeth Prismari.
When Galazeth Prismari enters the battlefield, it triggers once, and Preston triggers twice.
Resolve the Galazeth Prismari trigger, creating a Treasure token.
Resolve the first Preston trigger, creating a token copy of Galazeth Prismari that is a 0/1 Illusion.
When the Galazeth Prismari 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.

Combos with "Galazeth Prismari"