John A. Roebling's Steel Cable

Origin
John A. Roebling was a civil engineer who specialized in constructing wire suspension bridges. The United States at the time required better ways of transporting finished goods and produce between the eastern cities and western farms. Roebling’s bridges, including the Brooklyn Bridge, helped move people and goods across the country instead of by canal and railway.

Effects
When thrown over a large, impassible obstruction (crevasse, body of water, blockade, minefield, etc.), the cable will create a suspension bridge from its own fibers. The cable will hover in the air and then rapidly rotate until the metal starts to grow lengthwise. It will then split into several directions, with new pieces added everywhere. Vertical cables to hold tension will sprout from the top, while the sides will replicate to form a dense, knotted weave for the bridge’s base. Each bridge will only be attached to the endpoints the user decides, while the rest of the body will be suspended above the ground, floating.

The bridge can grow for great distances, although unused portions quickly dissipate when no large loads are present. Standard width appears to be equivalent to one highway lane, but the track can grow to accommodate wider vehicles.