ONYXX
Real Name: Sidney Green
First Appearance: X-Men (Vol. 2) #171, August 2005
Powers: Onyxx's mutant abilities manifested during his teenage years, resulting in a permanent uneven granite physiology. He had extra dense bones, muscle, lungs, organs, etc. that function the same as normal humans. However, he still needed food, water, oxygen, and sleep (albeit to a different degree), had natural healing and recuperative abilities, and so on.
He possessed superhuman strength (Class 5), endurance, and his hide was comprised of uneven granite that granted his body resistance to most forms of physical impact, except for his head area which he covered with a metal helmet whose specifications remain unknown. He also possessed four eyes which permanently glowed with a red hue and an inhuman skeleton.
