Gamble

This is not a swordsmanship Aeryon learns from anyone.

There is many tales in the Great Steppe and even in Yan where warriors would go travelling and adventuring and met great master and learns all kinds of skills.

Some gained powerful internal energy method, some learns powerful swordsmanship and some learns other skills

Even in the tribe, Aeryon had heard of such matter from Burchu and other warriors where in their childhood, they would seek a teacher to learn powerful methods of fighting.

Aeryon on the other hand had no such teacher.

The tribe for most of his life is poor.

And relying on his father inheritance, it is enough only to support the tribe.

Not to mention masters like this would rather sell their services to powerful tribe and not some small tribe unless they owe you or there is fate between you and this master.

It does not mean he has no teacher at all.

But these teacher did not teach him powerful methods.