Walkthrough:The Legend of Zelda: Twilight Princess/Diachronos/Goron Mines

Summary
Thrall navigates the scorching depths of the Goron Mines, nearly getting roasted countless times. Along the way, he meets the other three Goron Elders, who give him pieces of the Boss Key, and a crazy Goron responsible for protecting a sacred weapon once wielded by a Hero. Then he saves the Gorons' patriarch from an evil power and gains the second Fused Shadow.

Oh, yeah. And he finally gets a ranged weapon that doesn't suck.

Through the Fire and Flames
(That wasn't a DragonForce reference; that's where you're going through about 90% of this place!)