Locations that give bonuses to avatars within them
It would be cool to have certain map locations (dungeons, etc) give a bonus when your avatar is stationed inside them.
A moderately powerful location could give a casting cost reduction to a certain type of magic, or a mild power boost.
A really powerful location could allow the casting of a spell not cast anywhere else. Or allow you create items with a special power you can't get anywhere else.
e.g. an ancient item workshop of the old gods for forging that sword-of-extreme-doom, or (tying in another idea) forging the "this-item-will-let-me-survive-avatar-death-once" item.
e.g. a magical "fault line" where the really high level world-wrecking spells could be cast since it's one of the world's weak points. Maybe even escalate into a "destroy the world" victory condition, but that may be going too far.
This would be one more way to use the resource of "where is my avatar standing", with the tradeoff that it prevents using your avatar in combat (unless combat is nearby), and that the location can't be fortified as well as a high-end city to protect the avatar.
Another possibility is a location that just gives ridiculous bonuses to the avatar in combat *at that one location*, so as a last resort you could hole up there and at least take a preternaturally large amount of armies with you.
Thoughts?
Thanks,
Keith