"Let's go." Solus said, interrupting Lith's train of thought. "Next stop, the second underground floor. The Armory."
"What happened to the crystal mine?" Tista asked.
"It's right above us." Solus replied. "The Crucible will always be at the last floor because it needs both lots of world energy and the lava that I'm drawing from Mogar's mantle while the crystal mine will remain second last.
"That's because the deeper the tower gets in the mana geyser, the more abundant the energy flow is. The tower places its floors so as to optimize the consumption of world energy.
"If the Crucible and the Forge were to be swapped, the tower would need more arrays just to keep the heat from damaging the floors below. On top of that, the excess world energy would hinder our Forgemastering experiments.
