"It was a newly custom-made Earth-Sealing Fire Furnace," Lu Qing explained casually.
So that was it. Yu Ci understood. Since Lu Qing was a master artificer, she naturally needed a good source of fire for her work. In the Li Chen Sect, even high above the heavens, Lu De used talisman arrays to gather True Sun Fire for artifact refinement. Deep beneath the northern wasteland's strata, however, earthfire was naturally the best choice.
Yu Ci paid it no mind and began discussing the banner's talismanic patterns with Lu Qing in detail.
After talking for quite a while, he felt that diagrams alone were not intuitive enough. He simply traced shapes through the air with his fingers, laying out the talismans in separate forms and explaining them one by one along the condensed lines of spiritual light.
Lu Qing was quite interesting herself. Halfway through listening, she conjured a bundle of ordinary silkworm thread as if performing a magic trick. Without using a needle, her ten slender fingers seemed to possess suction. As they overlapped and darted about, they linked and outlined the threads, gradually forming a shape.
Watching her astonishingly skillful technique, Yu Ci silently praised her. His confidence in the completion of his own banner rose by several degrees.
Yet at that moment, he also discovered a small flaw in his overall planning. "I should have built the main body of the ritual altar first. Once its central functions are complete, I can then forge the other ritual implements with something to follow. But where am I supposed to find the Mysterious Water Obsidian for constructing the altar...?"
That slight distraction did not affect their discussion. Yu Ci's hands and mouth never stopped moving, and seeing the rudimentary form of a banner gradually take shape in Lu Qing's hands