I’m trying to find the Idol of the believer, but I have to find the mountain monastery to get to the friendly skeleton…? Is my understanding of my situation, but I’m confused on where this all is.
1- You must do the Catacomb quest with Cocona present.
2- in the end of the dungeon there is a friendly skeleton, who will not attack you, if you talk to it with Cocona present and DO NOT ATTACK THE FRIENDLY SKELETON!
3- this should be it, a little story will roll and you will get the idol of the believer.
the fandom wiki is pretty spot on and it also has images, you should refer to it, but the missing point from there is that you shouldn't kill the friendly skeleton.
Edit: nvm it does say that you shouldn't kill the skeleton.