章 1530: Someone Following

The cost of one bottle of medicine was one million gold coins, but the price of the black wooden token wasn't low either. Otherwise, there wouldn't have been so many people selling it off to the highest bidder in private. 

They had gone through a lot of trouble to obtain the black wooden token. Though the design was simple, it couldn't be easily duplicated. Every piece of black wooden token had the words Ghost Doctor written on it and also had a unique logo. You could only buy the medicine if you had the token from the Ghost Doctor. 

Now he had obtained a bottle of medicine, a fourth-grade Spirit Gathering Liquid, and the quality was so pure that it had never been seen on the outside either. Therefore, he hoped to buy another bottle to bring back, but…