The wooden box was palm-sized and purple-red, with straight wood grain and a delicate feel. Its four sides were completely bare, without any decorations or magical patterns, like an utterly ordinary jewelry box.
Zheng Qing had thought he would see a pocket watch after opening the box.
But what appeared before his eyes was an hourglass.
The hourglass lay quietly on red velvet. Its two ends were ocher wooden bases, connected by three slender black pillars. The pillars were covered in densely packed incantations, as tiny as mosquito tracks. Two teardrop-shaped transparent glass bulbs were held between the pillars. One glass chamber was empty, while the other was filled with evenly sized, translucent grains of sand.
"Inside is Time Sand."
The professor's voice sounded beside the young wizard's ear. "Time Sand is actually the fossilized eggs of Sand Hour Worms. You saw Sand Hour Worm eggs in the Blank Land, didn't you? ... Nothing could be more suitable for carrying the power of time than their fossils... The amount of this Time Sand has been carefully calculated by the Relevant Department. Not one grain more, not one grain less... See the incantations engraved along the edges of the upper and lower bases? Every time you invert the hourglass and recite the incantation on the blank side of the base, you can turn back three and a half hours of standard time."
Zheng Qing forcibly restrained the urge to turn over the hourglass in his hand.
At that moment, from the corner of his eye, he noticed that Jiang Yu was holding an identical Time-Turner. A flicker of curiosity suddenly rose in his heart. "Professor, what would happen if the two of us turned these hourglasses at the same time?"
"In theory, two 'Time Knots' would appear."
Old Yao bit down