In Chapter 1 of The Witcher 2, I encountered two people dressed in merchant clothing who asked me to test a potion for them, with promises of great rewards to come in a year or two at Vizima. They were whispering cautiously between themselves and one of them shouted that the gods have no love for my kind as I approached. In spite of this, I decided to be a trusting person and took the substance. According to my inventory, it's a Critical Effects mutagen.

![Sketchy.][1]

Sketchy.

While I know [how to use mutagens](https://gaming.stackexchange.com/questions/22496/how-to-use-mutagens-in-the-witcher-2), I'm cautious to apply this one without understanding the consequences. Is this just a convenient scenario used by the game as an introduction to mutagens or will it have consequences on my character during later events?

  [1]: https://i.sstatic.net/nmH3K.jpg