Given the sheer difference between him and the person that created the ancient seal, even watching it operate at full power for a few short minutes would bring immense benefits to his understanding of the Dao of Formations and the Dao of Light. Especially considering that he was lucky enough to watch the process of the seal suppressing the being now locked away in the small sphere of light below the ruined hall.
Although comprehending the Dao of Formations or the Dao of Light to the Elementary Realm within the short time that the seal was operating at its full power, it still allowed him to have a smoother path when it came to comprehending these two Daos in the future.
As an example, he managed to breakthrough the barrier separating the Artisan Realm and the Master Realm. Officially becoming a Master Realm Formation Master in the short span of a few minutes.
Rumble~!
How many ppl thought the chapter title was about the old man? :3