Kevila Volcano region, originally thriving with a large number of fire-type warcraft, would generally be very active, but today, almost all the warcraft are just shivering in their nests.
Because today, a group of unfamiliar creatures suddenly broke into the Kevila Volcano territory, eliminating anything that posed any obstacle to them, even to the extent of the volcano's overlord, which now hasn't even left behind an intact corpse.
More and more Demon Emperors and Demon Generals flooded into this area, and as their numbers grew, black mist started to spread throughout the region.
Gradually, the mist began to dissipate, and even those warcraft hiding in their nests couldn't escape the influence of this fog, as these warcraft don't possess the powerful will of humans, most of them are inherently quite ferocious.
This mist doesn't seem to make them lose their sanity, instead, it seems to awaken their inner wild and savage instincts.
