-it strides, and consumes.
A larger land strain of the mutation. This once a sluggish and cumbersome vehicles has been split and strides into a 30-40 ft tall "spider" It's like a harvest man from hell. Under most circumstances would this freakish metal thing should not be even be remotely capable of locomotion. But perhaps there is a small biological factor at play that allows such things to be possible. The strains of mutations gets worse with every recorded and documented specimens.