Originally Posted by WampaX
Couldn't you just break the Mosacian down to its component parts and have the creator decide what abilities the construct would have? Like a giant lego set, with each ability tied to a CR increase, probably with a HD limitation that needs to be met first.
Sure, but that'd be up to the DM using it. I'm just giving the basic makings of the thing. Give it whatever you like afterwards.
Hrmmm, it'd be easier to go over if in the standard display (and hook horrors have 10d10 hd ;) )