Why did the Fadus become like this?

Quest Text Fools who were led astray...

Summary You already seem to know a bit about the situation.
Okay, I will tell you more.
Not too long ago, a meteor landed in Kamasylvia.
The Saints of Kamasylvia asked for our help.
We rushed to help when we saw white ash
floating from the land devastated by the meteor.
We have always believed that if one of us
manage to travel past the Ash Forest and to the Kabua Mountain,
the one would be reborn as the White Warrior of our legends.
In our Legends, the White Warrior is the hero that will keep the darkness at bay, and lead us into the light.
Only one who has mastered both mind and body can become the next White Warrior.
When we saw the white ash coming from the Ash Forest,
which was devastated by the meteor, some took it as a sign.
Especially since it also discovered that if we consume it,
it would cause us agonizing pain.
The white color of the ash and-the fact that it seems to only cause the Fadus such pain
added to the reasons why it was decided that us Fadus
could use the ash to train to become stronger than ever.
The ash would be the key to mastering both the mind and body...

Summary You have discovered the Western Valtarra Mountains.