The muscles in his brawny arms, built from years of swinging a hammer, suddenly contracted like steel cables as he swung the Armor-Breaking Hammer in a crescent arc.
Before the hammer's head could even touch the corner of Zhan Yan's robes, the dragon pattern on its handle collided with the old man's Iron Ruler, which had emerged from his sleeve. Sparks flew, drawing a three-foot line of fire between them.
"The coiled dragon pattern isn't just for show!" Zhan Yan slapped the hammer's handle with his Iron Ruler, the impact making the web of Xu Yunfan's hand go numb. "Listen up! The Spiral Groove seven inches down the handle of this Armor-Breaking Hammer corresponds to the trajectory of the Thousand-Pound Mountain-Shaking Hammer's interlocking Spiral Force. You need to get a feel for it often!"
"Thank you, Master!"
Though he spoke his thanks, the Armor-Breaking Hammer in Xu Yunfan's hand suddenly began to spin in his palm.
