Saigonnus
Auror
I had a character that wore mummy-wrappings for clothes... rode a midget cow and never bathed. It was always a competition between the others to see who could knock him into a puddle... or get him to swim.
My next craziest has got to be time travel. When I was watching Fringe I had this theory that the two dimensions were created because of timetravel, which is why there were only two dimensions, and why there was so much risk of one of them collapsing: One of them wasn't meant to exist. Well, that's not what Fringe did. But I took that idea and ran with it, and ended up with an outline of several different futures that were falling apart because of how many futures existed, and so they were trying to evacuate, or invade, into the present day to survive. The timetravel mechanics I used made it work out better than you'd expect.
They also don't have cats, apparently.My craziest world is still a work in progress.
It's pretty much always dark and there is no day/night cycle. There is a sun but it's far enough away that it mostly just appears as a pale circle in the sky and isn't that helpful in terms of heating and lighting and there isn't a moon. But I'm not getting super scientific with it.
Instead of going by day/night people tell time by the Howls. There is a howl every hour by the Hounds, (the servants of Death and they looks like wolves) and on the twelfth Howl, they collect the dead or those that Death has decided that it's their time to die.
The magic system there is completely based off of communicating to the spirits of things. Everything has a spirit in that world but there are only a few people that are capable of communicating with them. The magic-users are called Whisperer's and whether or not what they are trying to get the spirit to do succeeds depends on how realistic it is.
The world basically has two layers. The Surface which is mostly a barren wasteland of rock with nothing growing on it and has several stagnant pools of water from geysers. And the Underground, which mostly started out as enormous underground caverns which people live in. Though as time passed, people made them larger and more suited for living in. The world is mostly heated by it's core and there are large rifts that vent heat where most of the cities grow around.
Water is a precious commodity as most of the world is a hunk of rock. There are large underground lakes and the water cycle is basically geysers that blast the water up the the Surface where it ends up in stagnant pools. Though people have created tunnels so that the water comes back down to the lakes. The Whisperers can purify the water though they have to collect the bacteria since they are basically just separating the two. The bacteria often gets weaponized or people experiment on it to see if they can come up with a way to get rid of it without needing Whisperer's.
There are also light stones that people usually use as a light source. There are a lot of mushrooms and fungi, stuff that you would find in underground caves as far as plants and all that goes. Animals are pretty similar and everything is adapted for either the cold or the heat.
As far as needing fire goes there are elementals on the world and fire elementals are typically captured from the rifts and enslaved for use in the cities.
Well...no, it wouldn't make any sense to have cats. Most of the natural habitat and prey for cats don't really exist in this world. Mammals aren't overly common, I'm trying to go with animals that are closer to cave/underground animals for this world since that's technically what it is.They also don't have cats, apparently.