[The Vorpal Tribble]

Ok, all mentioned typos, inconsistencies and the like have been adjusted ;)

Also, shouldn't it just have the equivalent of Regeneration(not real Regeneration, as that requires a CON score) that everything except bludeoning damage bypasses, rather than complete immunity to it?

Its basically the same thing, except its bones are like a jigsaw puzzle to it. They may break, but the pieces can be forced back together.