An Ogre with a Rock Eye has cast one of his own eyes into the Great Maw and replaced it with a rough pebble taken from the parched grounds around the vast pit. So the rock doesn't fall out, an Ogre will choose a large one and hammer it into place. Once properly fitted, the bearer gains a second sight - able to focus his stony gaze and glimpse into the unknown, seeing that which can't be seen.[1a][2a]