Contagion

Contagion was a Marvel comics supervillain and enemy of Wolverine, he was an extremely depraved and evil villain even by the standards of comic book fiction, going as far as torturing his own son via infecting him with a strange disease that horribly mutated him, forcing Wolverine into a series of horrific tests to find a "cure", yet in reality he had no intention of curing his son and wanted to watch his head literally explode.

If this was not bad enough Contagion experimented on many, many beings across time and space, seeking to perfect a virus that would wipe out all life - making him a would-be-universal destroyer far worse than even Thanos, since he took a perverse fascination in agonizing ways to mutate and harm others, needless to say he was among the most brutal and dangerous modern threats Wolverine faced and had to be cannibalized by Wolverine and a group of other "unkillable" mutants just to stop his rampage, since even a single piece of his body could produce volatile plague on an apocalyptic level.

Powers
Contagion is a walking factory of unimaginable plague and suffering, his body fluids alone were packed with every known disease and affliction on Earth as well as a great many exotic and horrific diseases of his own creation : his power was so tremendous it was stated he could create any affliction his twisted imagination could fully conceptualize.

Among the least of his many afflictions were manifestations of AIDs/HIV, Australian bat lyssavirus, Black Creek canal virus, Camelpox, Dengue, Echovirus, mumps, oropouche, parapox smallpox, sowbane, "Strain XV infection", syphilis, toxoplasmosis, UR2 sarcoma, West Nile virus, WVU virus 2937, xenopus and Zoysia mosiac virus.

He also made extensive use of technonecrotic virus, made via manipulating Technarch DNA, infecting organic and inorganic hosts, turning them into unliving zombie-like beings that would pass on the infection to others.

He also had superhuman-strength, invisibility, invulnerability, a healing factor rivalling Wolverine and great knowledge of computers and technology.

Finally, he had rocket-launcher cane, which he used frequently in battle as a trademark weapon of choice.