Activate Torrential Gearhulk by paying 1, blinking it.
When Torrential Gearhulk enters the battlefield, it and Deadeye Navigator's soulbond ability trigger.
Resolve the Deadeye Navigator trigger, repairing it and Torrential Gearhulk.
Resolve a Torrential Gearhulk trigger, casting Hanabi Blast from your graveyard without paying its mana cost.
Storm-Kiln Aritst and Birgi trigger.
Resolve the Birgi trigger, adding .
Resolve the Storm-Kiln Artist, creating a Treasure artifact token.
Resolve Hanabi Blast, dealing 2 damage to any target, returning Hanabi Blast to your hand, and then causing you to discard Hanabi Blast.
Activate the Treasure token by tapping and sacrificing it, adding .
Repeat.
This loop relies on an engine of constant recursion and mana generation fueled by Deadeye Navigator pairing with Torrential Gearhulk to repeatedly blink the massive construct. Each time Torrential Gearhulk enters the battlefield, its ability lets you cast Hanabi Blast directly from your graveyard for free, which triggers Storm-Kiln Artist to forge a Treasure token and Birgi, God of Storytelling to kick in extra red mana. As Hanabi Blast resolves, its own built-in penalty forces you to discard it right back to your hand, but you can easily fund the blink and cast sequence by sacrificing the Treasure for blue mana.