How Do I get Auron's Sigil?

I know I have to collect monsters. How many, which kinds, and what areas, Is what I mean.
I have no idead how many i should get.

Check www.gamefaqs.com, I'm sure it listed in a gazillion walkthroughs there.

I don't know, my guide says to get 10 of each monster in 10 different areas.. but I only got 1 of each in 10 areas and I got the sigil.

Yeah, you only nedd one of each in ten areas.

Make sure that one are id Mt. Gagazet.
That will save you some time in a matter i will not spoil for you.

unlock 10 bosses. original do not count