The cruelclaw split from its ancestor the sawclaw and moved into the southern Krakow Temperate Forest. There it found few predators and no competition for its food. Still the cold winters meant decrease in size for the females, but the males whose’ competition selection grew became much larger getting to 2.6 meter of length. It has gotten much fatter to survive the cold and its third foot-tail became as powerful as its two other feet. They now use their powerful jaws and fangs to feed on the snowcap fernplent and no longer use their claws for this purpose. Their claws are now only used for burrow digging and for the males’ inter-specie fighting in the reproduction season. They can also feed on different kinds of flora when food supply is short. They still use their crests, which changed in shape to become more unique and visible in the woody environment for communication through color flashing.
They live in large herds of 10-30 females which are leaded by a single alpha-male. Alpha males which stay at this role for many years can grow larger than the average male through extreme feeding for years of abundant. The other males live and hunt alone. In early spring the herd parks at a place of safety. Then other males will try to challenge the alpha male for the right of leading the herd. These battles get extremely bloody and most males get slain because of the usage of their deadly claws. The victorious alpha-male will then mate with all the females. Later for about 2–3 months the females will lay eggs in one massive herd burrow and take care of them together until and after they hatch. When the young hatch and get big enough to walk the herd will return to wander. They maintained their sexual dimorphism as the males are much larger and have huge spiky nostrils and white coloration around their eyes.