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Onyxx (Marvel)
Real Name: Sidney Green
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Organic rock hide; superhuman strength and durability; second pair of eyes

Growing up in a number of orphanages and foster homes in New Jersey, Sidney Green was a boorish, clumsy child, often the target of cruel bullying, by children and adults alike. Also an inveterate bed-wetter, Green carried around with him the funk of uncleanliness, which further ostracized him and made him miserable. Green's attempts to curb his nightly emissions by avoiding liquids led to dizziness and dehydration. Once his mutation manifested, a blissful drought beneath the waist set in, and there was a lack of sodden sheets. As a student at the Xavier Institute, Green had regained some confidence, forwarding audacious advances to aesthetically stirring female student Foxx. When Foxx was exposed as Mystique, Green sensed betrayal and attacked her. Within days, Green was able to walk again. Yet, the experience of being smashed in the head with a flush-lavatory triggered unfortunate memories of his childhood, perhaps permanently traumatizing him.


First Appearance: X-Men (1991) #171

View a chronological listing of this character's appearances

Issue Appearances:
Dark Avengers (2009)
Dark Avengers/Uncanny X-Men: Exodus (2009)
Dark Avengers/Uncanny X-Men: Utopia (2009)
Nation X (2010)
Nation X: X-Factor (2010)
New X-Men (2004)
Phoenix Resurrection: The Return of Jean Grey (2018)
Uncanny X-Men (1963)
X-Force (2008)
X-Men (1991)
X-Men Legacy (2008)
X-Men: Earth's Mutant Heroes (2011)
X-Men: Manifest Destiny (2008)
X-Men: The 198 Files (2006)

Group Affiliation(s):
Chevaliers Squad (Marvel)
Xavier Institute Students (Marvel)

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