to be short and sweet, I want to make a fantasy web comic at some point in my life (maybe in about ten years).

what I want to do with the comic is fairly simple; its basically a fantasy world with modern day tech, government, entertainment, and a few other things but I can't remember what the right words are.

My problem is this, I've been buying some RPG monster guide books (the series being Pathfinder) to help with the monster creation but now i'm worrying if I might be plagiarizing the book accidentally. Like if I see something interesting in the book and I think its something that's been apart of the monster forever and so I use for the monster in my comic. Unfortunately, now I find out this is something the company came up with so now I'm being called a plagiarist without even knowing I was. So should I stop using the books and find a different way of getting the info I need.

I thought that maybe someone here could help me out. If I didn't word something right or if you just don't get what I'm trying to ask, please tell me so I can be more specific and explain more because I really could use some help here.

P.S. if you would also like to know more about the comic, again, please ask :)