Deadeye Navigator is paired with Galazeth Prismari.

Activate Galazeth Prismari by paying , 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 .
Repeat.

Deadeye Navigator is paired with Galazeth Prismari.

Activate Galazeth Prismari by paying , 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 .
Repeat.

Activate Emiel the Blessed by paying , 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 .
Repeat.

Activate Emiel the Blessed by paying , 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 .
Repeat.

Activate Ashnod's Altar by sacrificing Galazeth Prismari, adding .
Galazeth Prismari dies, triggering Nim Deathmantle, causing you to pay 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.

Activate Emiel the Blessed by paying , 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 .
Repeat.

Agatha of the Vile Cauldron has power 2 or greater.

Activate Emiel the Blessed by paying , 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 .
Repeat.

Activate Emiel the Blessed by paying , 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 .
Repeat.