Throughout history (comma) there exists those blessed with great power. (Blessed works here, but down a little when you mention the suffering, and the price, I have to wonder if they are blessed or cursed).
Heroes and gods, villains and daemons. (unusual pairing, as it is usually H & V, G & D. Not bad, just unusual).
Myth and legend, truth and history. (truth is not to history what myth is to legend. Truth seems a bit out of place. I'd probably have gone with Myth and legend, history and fable, but that's not exactly great). Also, ending this sentence with history, when you ended the first half of the first sentence with history, is repetitive and doesn't feel right.)
Warriors who rend steel with their bare hands, mystics who turn woodland fare into miracle cures. ( <3 )
Look upon them with awe, for they can reshape the world. Look upon them with pity, for the greater their feats, the more they must suffer.
For every action, there must be a reaction.
For every gift, a Price. (For every gift, a... Price)
I absolutely love your metre. The construction is fantastic, the repetitive sentence shaping works really well. It would screw up if you went with my suggestion of the word fable. I'm not sure, but you might want to consider dropping the word miracle.
It doesn't really tell us anything, but it's well constructed, reads smoothly, and makes me want to check out a sample at the very least.