I have a (REALLY weird) theory.What if Spiriah,who was experimenting with the Skakdi,actually used the Skakdi as a "backup plan" in case the Makuta species ever got wiped out?Maybe he programmed the Skakdi,so that if the Makuta species were wiped out,the Skakdi could replace them to continue any other "future plans" in case the the Take-Over-The-Universe-Plan failed.And yes the Brotherhood named Spiriah as a rogue member,but maybe that was actually just an act (quote from BS01: the Order of Mata Nui later suspected that Spiriah had been operating under the Brotherhood's orders all the time. )And maybe Spiriah,who maybe saw Zaktan's potential,made him invincible to almost anything(like TSO's laserbeam) to become leader of the "next Makuta" . Which also explains why Teridax possibly didn't kill him.But just a guess though. http://www.bzpower.com/board/public/style_emoticons/default/sarcastic.gif