I just finished Blackdale and I went back for some training. I saw a huge Fire Bird but I hesitated to fight it because I didn't want to die. Lol. I left Blackdale and then I went back in and now the Fire Bird doesn't appear????? Do the rare monsters only appear once? If it does is there a way that they can appear again?

i dont actually know..
somtimes a rare monster is there... i come bak its not.. then after awhile its back again.

maybe its random..
im trying to get the ruler of the dawn to appear for the acheivement,
on the net people seem to say its random