Go across the lake and reach the temple of the Orks. Prepare for a fight, for by the time you reach the 4th floor you will be near dead and will need potions - Bring a lot. The last floor is the 10th floor and it has a bunch of those water orks, and you have to stay in one little piece of land as the rest of the room is flooded. When you finally beat it you get the Scroll of Power.
Also, ignore all the idiots making jokes.