Different Power Sources - Different Mechanics

[half-dragon dragon]

I definitely think that there should be some niche for each power source that the others couldn't step on. If I were to try and design something like this, I would really want the mechanics and flavor of each power source to interweave to some degree. To put it another way, I'd want the mechanics to capture the feel of the different power sources.

Anyway, keep the ideas coming, it looks like there are still people who'd get some use out of such mechanics.