hi guys i have a question - maybe thats not a failure - but i dont understand it:

Site: 32
The Ancient city Amdapor : There is following sentence -

" ... blanket of mold and rot caused by an imbalance lingering in the aftermaths of the Seventh Umbral Calamity. ..."

This calamity was the one with bahamut - would it not make more sense to go for the sixth Calamity (Water) - i dont understand how FIRE and Destruction causes mod ...