May not fit into this world, but just an idea.
In a world where numerous races/peoples are always at war, there is a prophecy that finding a certain item will bring back the dead magics (magic has slowly died out to be almost nonexistant). Someone evil thinks this means if they find it, they will have all that power. The hero is recruited with a group to recover it first.
The twist is, in the end, he doesn’t get the item, the bad guy does. The lesson is we don’t always accomplish what we set out to do, but sometimes we still do good. Along the way the hero and his group give people hope and happiness. In the end, the magic thrives through happiness through all the lands and peoples. The item itself has little power if any, possibly even a death trap. The prophecy meant that by rallying people to find the item magic could be restored, not that the item itself will have all the power for its owner.