Lin An encountered wizards, witch-hunting knights, and even dark sorcerers; regardless of their affiliations, they didn't feel like the types engrossed in underworld squabbles, but rather more like 'seekers of knowledge' in pursuit of exploration.
Even though he was aware that not everyone was like this, such as his subordinates or those within the Witches' Assembly, they hardly gave off the vibe of 'seekers of knowledge.'
Indeed, this might be the difference between ordinary transcendents and the truly powerful.
Master Axiu was clearly such a person.
The most magical aspect of the coffin-sealing sorcery was its ability to completely seal away spirituality, preventing the spiritual energy from the Spirit Realm from eroding it.
His research was obviously successful, but not completely so.
While the spirituality was well protected under the coffin-sealing sorcery, his body had quietly aged with the passage of time and eventually decayed and crumbled.