During this year, Krune and Iem were pretty much cultivating at the same pace. They went from the 2nd Stage of the Semi-Divinity Realm all the way to the 6th Stage. It was basically a breakthrough every three months. This speed would have been impossible in the Mortal Realm. Of course, Krune still had no idea that the time in the Mortal Realm flowed much faster.
Still, that wasn't all. Krune made sure to use that year to hone his skills too. For example, he reached the Semi-Divinity Stars Level as Blacksmith. It was to be expected, though. Krune finished cutting the Space God Crystal and already sold the extra 70%. With that, he was able to acquire many high-level materials for his practice. It would be weird if he couldn't progress.