So I have a creature that I think is a bit out there and likely impossible, but it's too good of an idea and I don't want to scrap it.
I don't really have a distinct shape that I want for it right now, so for the sake of argument, let's just say it looks more or less like the deathclaws from Fallout. This is not by any means a final design, just a place-holder while I work out the details of their anatomy. The thing that makes these Lizards (they are reptilian) different is the fact that after they are killed (by any means other than decapitation or a bullet through the brain) and their flesh is gone (doesn't really matter how), the remaining "skeleton" can move around, feed, and, for the most part, be a normal creature. The way it is able to do this is that its "skeleton" is actually an exoskeleton housing smaller backup organs. It is much weaker in this stage. I also want it to be able to regrow its flesh and go back to being a rampaging Godzilla.
Is this feasible?
How would the lizard regrow its body? Would it need a cocoon or could it just stretch the muscles and skin over its bones?
What would it need to eat? I was thinking that it could be a carnivore when it has skin (given the fact that it has more muscle mass) and an herbivore when it doesn't.
P.S. I don't need the behavior to be anything specific. If you think the bones are too weak to support an aggressive lifestyle, I have no problem with that, as long as you can explain how it would behave instead. Also, I do have some magic in the world that this creature lives in, but I don't want to use it for this, so magic is discouraged.