Tom O'Brien was a young working man in Metropolis who was forced to drop out of high school to support his family, and became a community figure in his neighborhood, becoming friends with John Henry Irons. While Tom was one of the strongest men in his neighborhood, he was captured by the alien parasite "Angon" who accidentally activated his metagene in an attempt to drain and feed on his spinal fluids. Waking up in a pile of other bodies (other victims of Angon), Tom found himself entirely covered in strange blades all over his body. Although at first in his confusion he believed himself to have murdered the people, and ran into some trouble with the MSCU, he would quickly team up with Steel in an attack against Angon, and although they failed to kill it, they did drive it out of Metropolis.
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This character was one of the many superpowered individuals introduced during the "Bloodlines" crossover event, where a number of Alien Parasites invaded the Earth and inadvertently activated the Metagene in a number of people. While not necessarily all members of the "Blood Pack", this group of people has come to be known as the "New Bloods". This template will automatically categorize articles that include it into the "New Bloods" category.