Chapter 664: [Bonus chapter] Celebratory Owl Soup

In the blink of an eye, five days went by in a flash. Grey and Klaus were still seated at the side of the small river. 

Initially, Klaus was the first one to have a reaction while they were both trying to comprehend the mystery behind the heavy water, but due to Grey not being a noob to things like this, he quickly caught up. 

Nevertheless, Klaus was still the one with the most elemental particles around him. Within a one-meter radius, everything around him felt extremely heavy. 

Klaus' comprehensive ability was no joke, in a matter of five days, he had gotten a good chunk of what was needed. He could even exit cultivation now, but he wanted to ensure he got the best out of it.