The Muscle of the Iron Rail

Hank was once an ordinary, broad-shouldered toad preparing for winter hibernation in the deep, foggy hills of Appalachia [4]. While digging his burrow near the legendary Big Bend Tunnel, a runaway freight train carrying experimental heavy-metal catalysts thundered off the tracks [4]. The resulting crash flooded the soil with shimmering toxins, transforming Hank into a living steel hero [5].
Now standing three feet tall with a barrel-shaped chest and skin of metallic gray-green, Hank uses his incredible strength to protect the "Iron Network" from those who wish to dismantle it [2, 6].