Looks good, albeit should note that castle moovement rate with it's legs is 60'ft per round (half of that in climbing and burrowing). I say castle gets +10 on hide checks with camouflage.<br/><br/>Overall castle uses hide/disguise modifier of the archfiend who 'pilots' it and it needs done in council chamber (taking a move action command movement of Soul Casket). Move silent checks are impossible in category.