I've tried to look up the answer on my own and I can't find anything that's really giving me the answer I need so I'm hoping I can get some help here.
I created a Ninja character that was smuggled out of Chu Ye at a very young age and after hearing the stories has grown up to hate Oni and wants to take them down a peg or two, but I don't know what skill to give the character to know how to ID them. I was thinking Knowledge: Planes but since they're considered Native Outsiders would Knowledge: Dungeoneering help instead?