In the quest where the Gray Fox himself sends you to get something from a wizard in the castle. You have to go through this cave place with monsters and stuff. I found where you have to go but, I didn't find the key to that room. I looked everywhere. Little help?

thats not the way dude, i had the same problem. There's water places in the tunnel right? One place it goes down really deep, and there's slaughter fish. there is another pathway to take somewhere in there.

DO NOT GO THROUGH THE SMALL HOLE ON THE VERY BOTTOM! this is not the way the passage and that is too far down. the passage is along the sides, and kind off hidden. basically look at your map, one of the passages you probably haven't explored yet, try it out.

casting a light spell or using an item with constant effect light *x* on self works wonders in situations like this(finding the other passage in the water). try that if you can't find it after a while longer.