There is a secret to mana--of this I am sure. The elves seem to have the more intimate knowledge of what mana truly is. What is certainly self-evident is that mana is necessary for life. One could say, it is the spice of life. Perhaps the elves' knowledge stems from their much extended life span. Or perhaps they brought that knowledge with them when they came to our world. Whatever is the case, they brought to us the mana tree. But if they brought it to us, then how could humans have alre