Spoilers in this post!
I was wondering if someone could help me out and list where all of the Goblin Chieftain Keys are? I've looked in every campsite, even backtracked to the one above the trap door and can't find the fourth key anywhere, and I've only battled 3 Goblin Chieftains. So I'm wondering if I have to hunt around in the tents to find the fourth key, instead of hunt for a boss battle? Thanks!
Spoilers end here