Suspicious and unbelievable

Exploration Stage: Maze of Fear
From: Martha
Description: Cannibal boxes, snake crowns, ghostly restraints... I've never heard of such things. Let's check out Jack's Bestiary, or Monster Manual. It might be of some use.
Completed: The creator of this relic is Jack himself. Read it and you'll learn all you need to know about the various monsters. There is some dubious information here about monsters that can take on different forms. Could this be what you're talking about?