Short: Benumb Z-103
This is the Benumb, prototype Z-103. They say this being was once a test subject at the Osiris Corporation's Arctic Research Facility, but experiment after experiment has turned it into this... abomination. His spine is completely exposed. His skin is blue with green lumps and his left arm has swelled over a huge hydraulic needle that was once used to administer drugs. The arm is monstrous now - the deformed arm and needle look as hungry as Benumb's eyes.
Benumb Z-103 is a boss.
Benumb Z-103 is rated as an incredibly skilled warrior.