What can change the nature of a man?

This is what my eyes see, my Love, unfettered by the shackles of time. You shall meet enemies three, but none more dangerous than yourself in your full glory. They are shades of evil, of good, and of neutrality given life and twisted by the laws of the planes. You shall come to a prison built of regret and sorrow, where the shadows themselves have gone mad. There you will be asked to make a terrible sacrifice, my Love. For the matter to be laid to rest, you must destroy that which keeps you alive and be immortal no longer.