Gaohe Yan released his divine sense into the bag, and after a moment, a gray light flashed in his hand, producing a palm-sized gray triangular stone slab.
"Venerable Darkness, this is..." The old man in the black robe glanced at the stone slab with a look of confusion and asked.
"This is the Eternal Imprint Stone that ancient cultivators used to preserve precious jade slips so that they won't be damaged by the passage of time. It requires special methods to open it." Gaohe Yan's eyes flashed with a hint of joy as he casually replied to the old man in the black robe.
He immediately muttered some incantations, flicking his fingers several times as a few streaks of black light flashed and disappeared into the gray stone slab.
The gray stone slab emitted a dazzling gray light, with countless gray runes appearing on its surface. After these runes flashed, they vanished completely, and the gray stone slab made a "crack" sound, turning into powder, revealing a white jade slip inside.
