Notes
Vultraz became a bit more powerful after becoming a shadow Matoran. The transformation had the effect of removing one's sense of justice and morality.1
The process to create Shadow Matoran did not exist that long (a few weeks at most) before story year 2008.2
The Makuta Phantoka had a telepathic link with the Shadow Matoran, allowing them to see through their eyes.3
If a mutated Shadow Matoran transformed into a Toa, he would have had wings.4