The "dark place between a lake and a holy island" is the taverlydungeon. They must have changed the clue to make it better. The scorpion will still be in the place the guides tell you. Before, you would either know exactly where the scorpion is, or, not knowing everything in the taverly dungeon off by heart, have to ask someone or use a guide. Now, you can work out that it's between entrana and the lake, and then have fun exploring taverly dungeon =D ... Or fail out and use a guide >_>