Both of those ideas are cool, and you saying 5 colors reminded me of Magic... so what if time...
What if one form of magic came from within the land and the different kinds of lands, and each land also brings with it an affinity towards certain kind of magic powers. Maybe the first Affinity has normal costs to magic and powers, but if someone wanted to have an Affinity with a second then those powers could cost more... and a third Affinity could cost even more, etc... it's one way to let people have versatility but it would cost them.
Maybe also people who are devoted to certain 'Gods' like the Norse or Greek, could game powers based on their God's Domains.
Just brainstorming ideas there...
For your five colors what colors are you thinking and how would you work the powers within the framework?
I wish I had the GM book.
Yeah thats pretty much what i was thinking on the first part! i just haven't really organized my thoughts yet.
as for the gods i'm going to skip the "domain" powers because I want the "gods" to essentially be level 14-20 characters. i don't want them to be able to do anything players can't. There powers will be limited by the same rules as the players but they will just be higher level.
as you can tell by the flavour, it won't be like many campaign worlds (forgotten realms or wow) were every town mayor is a 20th level fighter. the majority of people will be character class-less peasants like in old dnd. Player characters will be 1 in a million (give or take a few numbers).
just off the top of my head (as I remember the magic the gathering colours):
black - necromancy, death, disease, mind control,
minor - earth/ water.
red - fire, lightning, earth, metal
minor - air, mind control
green - nature, earth, strength, life
minor - water, air
blue - water, meta magic, air
minor- earth, life
white - air, fire, life, protection
minor - earth, nature.
Characters would also be limited by a class archtype, ie
Figther
Sneak
controller
artillery
all three would be magic or technology users though,
or maybe instead they are already limited enough by theme?
I want to limit the player characters to create uniqueness and themes and roles within the party... but not to the point of handicapping there ability to make a cool class, or the character they want to play.