(Picture links to Flickr)
Based on this concept art
I always loved the multiple skeleton army concepts we got but the one of Kulta Kal was my favourite by far. The fact that you could make a combo model with them like in the old days of Bionicle was something I really missed in Gen 2. The Kulta Kal model in the picture is in fact made with only the pieces of the other four skull creatures. I tried to go as accurate to the concept art as possible but things like the split-face hammer didn't really work. The MOC's are also mainly made with CCBS to keep it in spirit of Gen 2