I've already played through the DG quest line and even finished that ridiculously long dwarven based side quest (might rage about that in another thread), and still i have not seen anything pertaining to the words shell or bug.
Are they unlocked through level?
Are they hiding in some falmer anus of a cave?
Are they hostile?
How big are they?
Are they particularly rare?
I'd be extremely grateful if you could answer a few of the above questions and it wouldn't hurt to tell me anything i forgot to ask about
(BTW i know this has been asked before but the answers given in those threads were so vague that i couldn't decipher then if i were the freaking head of calligraphy at Harvard).