Jacob took out a silver needle and immersed the tip of the needle in the solution. The shimmering silver needle tip suddenly turned into a mass of black. Seeing this, Jacob's facial expression changed instantly. Silver needles could be used to test poison. This method was used by the ancient emperors each time before they had a meal. So, did this mean that there was poison in the medication?
In order to be sure, Jacob placed the silver needle on the tip of his tongue to taste the medication. The medication tasted sour. Also, there was a numbing sensation running down from the tip of Jacob's tongue to his throat as soon as he tasted the medication. After that, the sensation disappeared.
Jacob was shocked. He knew what this medication was. He yelled in a deep voice, "Put down the child! Now!"