Former Queen Katherin of the Elves expressed shock and disbelief at the revelation that Amberser's teacher was a deity.
The title of teacher was not one to be casually thrown around, especially for those of great stature; calling someone a teacher without due respect could result in severe punishment.
Amberser claimed he was a student of the God of Alchemy, not just a follower; this relationship was much closer than any Godfavored. The favored of a deity may sound impressive, but in reality, it's just the deity rewarding you with something when they feel pleased, a charity from the superior to the inferior. But the relationship between teacher and student is completely different; at least in terms of status, they are on the same level, and the relationship is much closer.
In certain special circumstances, students were eligible to inherit their teacher's legacy, and rightfully entitled to the teacher's personal guidance.