Crossing over in the storm lands marked the formal start of their isolation. For some reason, the terrain became a lot more rougher and uneven. Scars and impact craters marred the ground and vegetation grew unevenly or with more mutation. It made the environment resemble a primal playground that still needed a couple of hundred-million years to settle down.
Even the wildlife grew more feral. Fewer animal hordes roamed the lands, but each individual beast seemed larger and deadlier. The carnivores who preyed on them had a tough fight on their hands if they hunted a healthy herbivore!
No more ancient cities dwelled in the storm lands. No sacred gods held territory here.
Another difference in the storm lands was that the prevalence of godlings and wild gods increased by at least twice or thrice. As lizard-like carnivores, they competed against regular carnivores who almost always lost the struggle.