Seeing that Shi Lei was merely a minor Cultivator at the Qi Refinement 4th Layer, the old shopkeeper had no intention of deceiving him. With great patience, he said, "Young friend, you might not know this. Although spirit tin is not the finest crafting material, once it is fused into weapons such as Magical Artifacts or Spirit Tools, those weapons acquire a unique property."
Upon hearing this, Shi Lei's interest was piqued. He immediately perked up his ears and listened intently as the old shopkeeper continued.
"The greatest characteristic of weapons containing spirit tin," the old shopkeeper went on, "is that they are exceptionally easy to advance in grade! For a weapon to advance, runes must be carved into it. Generally, fine Magical Artifacts are as hard as metal and stone, making it extremely difficult to carve runes upon them. Without considerable skill, an artisan can hardly carve satisfactory runes. However, once spirit tin is fused into a weapon, the situation changes dramatically. Carving runes onto such a weapon becomes a relatively simple matter."
Chapter 116