Onyxx

Onyxx
Publication information
Publisher	Marvel Comics
First appearance	X-Men (vol. 2) #171 (August 2005)
Created by	Peter Milligan (writer) Salvador Larroca (artist)
In-story information
Full name	Sidney Green
Species	Human mutant
Team affiliations	Chevaliers training squad [ broken anchor ] Xavier Institute X-Men-In-Training
Abilities	Superhuman strength and durability

Onyxx (Sidney Green) is a fictional mutant appearing in comic books published by Marvel Comics.

Publication history

Onyxx first appeared in X-Men (vol. 2) #171 (August 2005), and was created by Peter Milligan and Salvador Larroca.

Onyxx was killed by Wither during the 2009 event Necrosha . In a 2010 interview with Comic Book Resources , Necrosha writer Christopher Yost stated that he disliked Onyxx and intended to kill him off earlier, but was stopped by editorial mandates. ^[1] Onyxx returned during the Krakoan Age in 2021, having been resurrected by the Five. ^[2]

Fictional character biography

As a child, Sidney Green lived in various foster homes and orphanages, unable to find acceptance because of his crude behavior and chronic bedwetting. ^[3] This condition is cured after his mutant abilities activate, transforming him into a four-eyed golem-like creature.

Onyxx becomes a student at the Xavier Institute, assigned to Gambit's training squad, the Chevaliers. ^{[4] [5]} Onyxx has a romantic interest in a new student at the Institute by the name Foxx. It is later revealed that Foxx is a disguised Mystique, who infiltrated the school to destabilize the relationship between her foster daughter Rogue and Gambit. Mystique escapes and injures Onyxx. ^[6]

Decimation

Onyxx is one of 198 mutants who retain their powers after M-Day, when the Scarlet Witch removes the powers of most mutants on Earth. He continues to live at the Xavier Institute. ^[7]

Onyxx, along with fellow students Mercury and Loa, is tasked with keeping peace in Telegraph Hill, San Francisco after the mutant-hate group "Humanity Now!" marches from Sacramento to San Francisco to promote "Proposition X". After the riots subside, Cyclops comes and picks the three up, taking them to City Hall. ^[8] He is also seen in the company of Ariel when she arrives to pick up an injured Trance. ^[9]

Necrosha

In Necrosha , Onyxx is seen amongst those under attack by Selene's new Inner Circle on Utopia. Onyxx tries to sneak attack Wither, who kills him by disintegrating his body. ^{[10] [11] [12]} Years after his death, Onyxx is resurrected following the establishment of Krakoa as a mutant nation. ^{[2] [13]}

Powers and abilities

Onyxx has a craggy granite body, which gives him superhuman strength and durability.

References

1. Tramountanas, George A. (June 9, 2010). "X-POSITION: Craig Kyle & Chris Yost". CBR . Archived from the original on April 17, 2019. Retrieved February 23, 2025.
2. X-Factor (vol. 4) #5 (February 2021)
3. X-Men: The 198 Files one-shot (January 2006)
4. Official Handbook of the Marvel Universe A to Z #13 (April 2010)
5. Allan, Scoot (December 30, 2022). "10 Teams Gambit Has Joined In The Comics". CBR . Archived from the original on December 31, 2022. Retrieved February 23, 2025.
6. New X-Men (vol. 2) #35 (April 2007)
7. X-Men: Manifest Destiny #3 (January 2009)
8. Dark Avengers / Uncanny X-Men: Utopia one-shot (August 2009)
9. X-Men: Legacy #226 (September 2009)
10. X-Force (vol. 3) #23 (March 2010)
11. Walker, Gary (June 2, 2020). "Necrosha: The X-Men's Horrific Battle With the Undead, Explained". CBR . Archived from the original on June 9, 2020. Retrieved February 23, 2025.
12. Brueheim, Jackson (September 26, 2020). "10 Marvel Characters Who Can Kill With A Single Touch". CBR . Archived from the original on October 6, 2020. Retrieved February 23, 2025.
13. "X-Factor #5 annotations". House to Astonish. Archived from the original on December 3, 2020. Retrieved February 23, 2025.