Mr. Huang's eyes scanned the cave walls, probing meticulously.
Sure enough, within the soil on both sides of the stone wall, he discovered four inconspicuous iron boxes.
Because the boxes matched the color of the stone wall almost exactly, only a thorough search would reveal any clues.
In the center of each box was a small hole, from which the arrows seemed to have been ejected.
Seeing those boxes, Mr. Huang couldn't help but let out a light hum as he quickly squatted down, picked up a few stones from the ground, and hurled them at the four boxes.
The whistling of wind cutting through the air made it impossible to see where the stones went in the dark night, but one could hear the sound of stones hitting the stone wall.
As soon as the clashing sound was heard, the four boxes seemed to be triggered, releasing arrows with a swift swipe.
The speed of the arrows was such that one couldn't react in time.
