Fuchin Temple is a small monk's temple where many men are training hard to hone their abilities. It can be reached by moving south from Kolima and crossing the Kolima drawbridge.
Fuchin Temple
Climb up several sets of stairs until you reach a monastery at the top. Inside is an old man meditating. He will not talk to you, but when you try to read his mind, he immediately picks up on it. Recognizing your potential (and simultaneously reading your mind as well), he decides to offer a test that will allow Isaac and the party to pass through the dangerous Mogall Forest, which stands in the way of them catching up with Saturos and Menardi. You have no choice but to agree, so climb down the mountain, go to the man guarding the waterfall, and enter the tests.
Fuchin Falls Cave
This is the test you must undergo.