Quote1 Tis about time, it is, then... I was beginnin' t'wonder when y'r actions would match y'r reputation! Sorry t'say f'r you , boyo -- my actions speak louder than y'r words! Quote2
-- Black Tom Cassidy src


Tom and his cousin, Sean Cassidy, were rivals for the affections of a woman named Maeve Rourke. Maeve married Sean; however, her death seemed to revive their dislike for one another, not to mention Tom secretly raising Sean's daughter, Theresa.[3]


Tom became a criminal and came into conflict with the law and was apprehended. While serving time in prison, Tom met and befriended Juggernaut.

The X-Men initially clashed with Tom and Juggernaut at Cassidy Keep. He and Juggernaut were involved in many schemes. On one occasion Juggernaut sought to share his power with Tom, in essence creating two Juggernaut-like beings.[4]

Secondary Mutation

Thomas Cassidy (Earth-616) from All-New Official Handbook of the Marvel Universe Vol 1 2 0002

secondary mutation

After being shot by Cable, Tom was taken to France, where doctors grafted a wood-like substance onto his wounds, healing him and allowing him to channel his bio-blasts directly through his fists. Unfortunately, due to a genetic virus, the substance spread over Tom's body. He sought to use Deadpool's healing factor as a cure. He later attacked Sean and Generation X in a partially transformed state. He was defeated by Banshee, and the source of the plant was removed. However, when the X-Men later encountered Tom as part of the Brotherhood, he had become fully plantlike. Like the rest of the Brotherhood, Black Tom was sucked into Shen Xorn's head and transported to the Mojoverse, where they sold Juggernaut and Nocturne to Mojo and, in return, they were sent back to Earth.[5]


Black Tom lost his powers during M-Day.[6] He fought Excalibur, using technology to replicate his powers, but was defeated and turned in by his friend and former partner, Juggernaut.[7]

Tom has since shown great remorse for the death of Squid-Boy and claimed that his secondary mutation had affected his mind. Juggernaut visited him in prison, forgiving him for the death of Sammy. Tom correctly assumed that Juggernaut had not come to forgive him, but had returned because he was hearing voices again, and wanted to know if there was any way he could find redemption. Tom told him that he did not believe redemption was possible for either of them.

He was seemingly repowered, using his powers during an encounter with Deadpool.[8]

House of X

Tom was eventually welcomed to the new mutant island of Krakoa, created by Xavier, Magneto, and Moira X. He entered through the teleportation gateway alongside other villainous and fractious mutants, who had been invited to join the nation in order to heal mutantdom and start over as a whole species together.[9]

Power Grid [18]
Energy Projection*
Fighting Skills
* Lower ratings represent depowered status


Black Tom is a mutant whom had undergone various alterations and Secondary Mutation throughout his criminal career. After M-Day, Tom seemingly lost all his powers and reverted to a normal human appearance while still retaining his original powers.[7] However, he has since demonstrated both old and new abilities such as plant control,[8] shaping bioenergy into barriers using his shillelagh to deflect young Scott's optic blasts or strengthening his own striking & bludgeoning power by channeling energy through it.[10]

Bio-Organic Thermokinetic Blasts: Cassidy has the ability to generate blasts of concussive force or heat by using wood as the focus for his power; typically a wooden shillelagh. Following genetic engineering, Cassidy could channel the energy he generates directly through the parts of his body that were grafted to a wood-like substance.[11]

Environmental Symbiosis: After being welcomed to Krakoa as chief of security; Black Tom found he can share a synergistic link with the landmass itself in order to vastly enhance his powers. He and living island now share a consciousness greatly expanding upon the former's senses and powers by controlling the ecosystem in such a way it broadens physical synesthesia. Moreover, he can make the area Krakoa itself comprises move and act however he wishes; i.e. causing rising stone bed formations, knocking tree's down upon enemies, etc.[12]

Possible Genetic Immunity: Black Tom is highly resistant, if not immune, to Banshee and Siryn's sonic screams, and they are similarly protected from his bio-blasts; which is similar to Cyclops and Havok's sibling power immunity to each other.


His 'shillelagh', a wooden club.[16]

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