In a nutshell- spd x1-1/2; SQ cold resist 5+HD, max 20; darkvision 60'; lowlight vision; shadow blend (90% concealment in less than full daylight); plus one additional SQ per 4 HD (such as DR 5/+1, evasion, fast healing 2, mirror image 1/day, etc); add Move Silently +6; CR +1.
Gotta remember to bring that book when you need it...