I don't know why I said forest; I meant swamp. Didn't know there even was one by the pond. But in any case... these definitely aren't all successful options. I submitted to *both* lizardmen in the swamp, it just said I was unsuccessful both times.
Maybe it would work if I also found the one by the pond, even though it already claimed I was unsuccessful?
Also, what do the things in the Gain column mean?