Celtic Heroes

The quest says i have everything i have a pristine boar hide 3 rems of metal 3 water tabs and it also says i have the minor meteoric crystal which i dont so if i need to kill the twisted crawler please tell me where I need to go cause he doesn't show on the map

Go to farcrag sewers and behind the waterfall I believe or the zombie area.

Behind the one waterfall - very northwest most part of the map