What does the dratted Clairvoyance spell do? Early in the game, I got totally lost in a dungeon. After that, I bought the Clairvoyance spell. But I've tried using it several times, and nothing seems to happen.
Now, I wasn't expecting red neon arrows to light my way. Nor was I expecting a leprechaun dressed in silver to take me by the hand and lead me onward. But I was expecting something to happen. I see no change in the map. I see no change in my environs. I see no will-o'-the-wisp, no phosphorescent light, no ... nothing.
I feel like going back to the vendor and demand my money back, Or threaten to sue for false advertising.
First, you have to have a quest objective marked. Then, when you use Clairvoyance, it will show you a path to that quest objective. That is all.
If you are a heavy magic user, you can use Clairvoyance to get your Illusion skill up a bit, until you get Muffle. Then use Muffle at will in town to buff your Illusion to 100.
P.S. Using Muffle + Invisibility to torment guards not only looks cool, it's very fun, and doesn't hurt them at all. So they will get upset and chase you around telling you to stop, but they won't hit you or anything, just get really angry. It's a real treat!