My personal ideas for the world. Also why do we have to bind so strongly to such a strict idea of magic? Magic is as diverse as people are. On some worlds Red magic might be fire while on others it could be something completely different, for World of Warcraft I know that while fire magic is fire obviously it is also represented as Life magic by the way of the Red Dragonflight. Why can't we have magic of our own kind? I play RW as a bunker til swarm way.


What is the terrain make-up of this world?
Perhaps a whole other plane we've all wound up on and are now trying to help, thoguh after a while we've become leaders, not necessarily of the factions entirely but maybe we are famed commanders or generals tasked to lead the forces our faction commands. Each faction could live in a sort of biome of their own, like a RW faction would have rolling plains between towering mountains, nestled in these little vallies are big cities where their armies train.

What is the level of technology on this world?
Eh, I'm flexible...

Does this world rely more heavily on certain colors of mana (such as innistrad being inherently more black)?
This world since we're all different could have equal amounts of all magic unless some outside force is suppressing one or more colors.

Are we taking inspiration from any real-world sources?
Personally I'm not.

Ally or enemy colors?
All, why not have a diverse enemy that changes tactics depending on which faction they fight?

Who's at war, and for what reason?
Flexible, maybe we make treaties and ally as the situation calls, a fluid alliance.

And most importantly, what is this plane's name?
I vote for calling it Valedor (Pronounced Val-A-door)

Just my take on this.