I love worldbuilding, but fantasy isn't my strong point in writing, so I don't get to do it that much, so I would love to do this. 

Here's an idea–

Lazerbat's idea is the "main" problem. But like MoonHalo said, there are also many smaller problems–possibly related to the main one.

For example, if these gangs are the ones making all the money off selling magic, more "good" sources of magic sales (shops, etc.) could be going bankrupt, which might mean an international economy problem.

And also, maybe some problems arise from people trying to solve the problem. For example, maybe there's a group who thinks the best way to fix the problem is to completely ban magic. Maybe there's another who thinks everyone should get magical supplies and that they should be free. And maybe, at the same time, there are countries who are going to war. Maybe because the gangs are using the money they're making to like, build an army or something, so their leaders can take over–so obviously there are groups trying to fight them, and maybe there are corrupt governments who are getting paid by the gangs so the governments will give the gangs power. So with any main plot you pick, there are automatically going to be smaller problems. 

@Halo my idea was that there ould be multiple problems but all tied toegther. It wouldn't be, like, everything that is happening in the world, but it would go into more than most, say, book series would. I want there to be story as well as a world, though, still.

I'm not entirely sure about the modernized fantasy things . . . maybe there could be a clear divide between cities and villages like that, where cities are advanced and villages are falling behind, that would be cool. The crimes idea would be cool too — like I said earlier, we could have many problems tying together. To put a less often done spin on the stopping a war thing, we could instead have the world in a state of uncertainty. Some say that there is, in fact, war; others say that there is not, there kingdoms or whatever they will be are at peace. Some are trying to start/continue a war for valid reasons (maybe the crimes could go here?) and others are trying to create/maintain peace for valid reasons.

I love this idea! Lazer's idea that Sybill elaborated on is super interesting… maybe there's rivalries between different magic gangs? Maybe there's laws against magic people running for any tpe of public office and dragons and other mythical beings are being freely hunted for sport? This idea is awesome, I'm joining and can't wait to see where this goes!

Yesss totally doing this 😀

Ooh, these are all great ideas! I'm definitely joining. My mind is already starting to come up with characters XD

This sounds so awesome! All the ideas are really cool, I'll definitely be participating.

Question: What is the world's name? Like how our planets name is Earth, what is this world's name?

I think it should be Orbilata, a combination of the Latin words Orbis (world) and Lata (wide). 

Oooh, I'd like to participate! I think Orbilata is a good name for the world.

I like Orbilata!