Priest Kanis:
To enter the Water Dragon's Cave, you will need 1 Contaminated Crystal. The Contaminated Crystal can be found at the Dark Cloud Mansion.
They say that a monster named Balor rules over the Water Dragon's Cave.
I believe that Balor guards the place where the Shamaness is being held captive.
If that is the case, you will only be able reach the Shamaness by defeating Balor.
That creature is said to be far stronger and more frightening than ordinary monsters, so please be careful...
"I will depart now."