In my mind, the worlds get creepier as you go along. Wizard City is all nice and happy, and in contrast, Krokotopia seems creepier. Krokotopia has a lot of bright colors, then when you get to Marleybone and its all dark rooftops and killer rats, its scarier. I'm not sure all of Mooshu is scarier than Marleybone, but particular parts are. And it goes on and on. Khrysalis seemed pretty creepy, with all the things encased in crystal and weird insects trying to kill you. So I put out the idea of the next world, Aralthia. Aralthia is a world of darkness, with dark grey clouds hanging low on the horizon and obsidian ground. The trees have crude faces with black holes for eyes and mouths. Dark wizards, dressed in black robes roam around. It rains pure shadow. Here, shadow has more power than light, Evil is more common than good, and death awaits at each corner. Ghosts as well as living travel across Aralthia. This is the home to shadow. You have been sent to Aralthis for The Gem of Power. It awaits in the abode of a great evil. Locked away, the gem is nearly impossible to find. But you need the gem to defeat a great evil. (dunno is Morganthe will die in Khrysalis part 2, it might be a different evil person) You prevail and find the gem, but its core is damaged, and so you travel to another world to mend it ... Okay, so, this could be the next world, or it could be a world very distant from us, but I really want a world like this, with lots of evil and everything. So please consider my idea, and also ideas to improve or change parts of this are welcome.