The mogrolyth cannot be dismembered, - any object is able to pierce through the flesh, but the bone cannot be shattered or cut.
OUCHIES. You had me squirming at the slicing of the eyeballs. Gruesome. Liked the journal entries. I liked the fact that it's prime mode of operation is causing pain, not hunting. Adds a bit of realism to the surreal. Very good undead creature - just what we need in the wake of all the "Twilight" and "True Blood" nonsense we are living with.
This is a damn good undead, and a great submission. Skeletons and zombies are for pansy necromancers, to try and control one of these is true nectomantic power - but one doomed to failure. I agree with others, I dislike things that are truly invincible unless it's the terrasque. There can be only one! (Invincible thing, that is. Something has to be on top and it's sure not the gods.) The comments on this submission are great too, giving a lot of good food for thought. This community is simply awesome.