Hox was a Praxilion that was biologically modified. After the death of its fellow test subject Ver, Hox and its friend Loi volunteered to be biologically modified into a humanoid form using the Infinite Cocoon. Both Hox and Loi survived the procedure, but were tricked by the Sild into releasing them from captivity, and fell under their control. (PROSE: Harvest of Time)

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