Guy had his attention trained onto Markus and Al. Although Guy had heard of methods to peer into a mage's cultivation, he had yet to see a method that didn't require the target to die first.
The books he had read before primarily detailed optimal strategies to siphon the cultivation from a dying mage's dissipating core. Efficient ways to decipher the numerous insights condensed within the roiling ethereal mass, and so on. So, when Guy observed Al's attempt to perform an inspection into Markus' cultivation, and that too in a safe way, he was immediately enraptured. He treated this as an opportunity to gain another technique for his toolbox. After all, since he was responsible for training his Disciple, a method to gauge the boy's progress on a regular basis would be extremely useful.
