"The Swift Traveler. Not as fast as Copper, but light and eager to share the warmth."
One day, a young apprentice, eager and brimming with questions, asked, "Master, why do we use steel for the sword's blade, but copper for the cooling vats? Don't they both come from the earth?" Thermal Conductivity Of Metals List Steel
He paused, touching a finished blade. "The Guardian. Look how far down it sits on the list. Steel is stubborn. It holds onto the heat, letting it linger. This slowness is its strength; it allows the metal to be shaped and hardened without shattering from the shock of the cold." "The Swift Traveler
"The Recluse. It barely lets the heat pass at all, keeping the fire locked away, making it perfect for the handles of pots that must stay cool to the touch." "The Guardian
The apprentice looked at the glowing steel on the anvil, finally seeing not just a grey bar, but a slow, steady pulse of energy.
Elian smiled, his eyes reflecting the embers. "To understand metal, you must understand how it carries the fire's kiss. We call this —the speed at which heat journeys through its veins."