Purging Filth

Monk Hushu's body was covered in red-orange flames, leaving not a single inch of his skin exposed.

~SIZZLE~

The damp muck on his body first boiled and dried out before it finally turned into ash and fell off. 

The same happened to his robes, that had been stained to a questionable dark brown. The Kasaya was an Immortal tool originally, but seemed to have lost all of its capabilities, having been subjected to unknown filth and damaged beyond recognition.

This was also why it had ended up in the state it was. If not, the Kasaya had formations that would prevent it from getting dirty and stained. That was one of the most basic formations that were present in the clothes of cultivators.

Even Spirit Realm cultivators had them on their robes at times, and as such, it wasn't hard to make. 

~WOOSH~