[quote=@MarsAdept]
I am fine with either Tri or Dual color. 

Even if the war is not between human and elves (That was just an example anyways), I still think it would be nice to have two or more large factions be over smaller factions. A very complex war. The larger factions can be tri color while the lesser factions like the individual provinces be dual color. or not.
[/quote]

Ok, here's my take on the idea: 5 tri-color factions (most likely shards) are our large factions. Then 5 dual-color factions (if we use shards, we have to use ally colors here) are our lesser factions.  We can have them differentiated by creature types, using the race/class set up as normal. The tri-color factions would be our classes, such as grixis (UBR) being a coalition of wizards. The duals would be races, such as RB being goblins. Each race would fit into two of the classes.

I like the idea of the world being in a complex state of war. I'd think it'd be a WWI type scenario, with two of the races getting into a conflict which drags the rest into war due to the class-based alliances.

By the way, we should answer some simple questions to flesh out this world:

[b]What is the terrain make-up of this world?[/b]
[color=0072bc][i]So, the current suggestions are provinces on a single main continent, and a bunch of factions spread across islands. Of course, I'm in favor of the islands idea, since I don't think there has been such a plane yet. Possibly there was previously a larger continent that sunk to the depths. Possibly the factions rose up from the remnants of an ancient civilization who's entire legacy rests at the bottom of the ocean?[/i] [/color]
[b]What is the level of technology on this world?[/b]
[color=0072bc][i]I'm a sucker for low-tech tribal scenarios, but I feel like that wont fly here, so I'll leave this to you guys.[/i][/color]
[b]What creatures inhabit this world?[/b]

[b]Does this world rely more heavily on certain colors of mana (such as innistrad being inherently more black)?[/b]

[b]Are we taking inspiration from any real-world sources?[/b]

[b]Ally or enemy colors?[/b]

[b]Who's at war, and for what reason?[/b]

[b]And most importantly, what is this plane's name?[/b]