Humans who have acquired immortality somehow. They CANNOT be born with it. Did they use a rare magic spell? Maybe they invented a new serum capable of doing so? Maybe they just took the low road and made a deal with the Devil. WHATEVER THE REASON MAY BE, it's gotta be acquired, not natural. :D The ONLY exception to this is if the immortal is the spawn of the Grim Reaper himself. Yes, there will be an established Grim Reaper who is capable of spawning. HE ISN'T LOOSE though, so don't make him have, like, forty immortal children, BUT some immortals are accepted using this logic. XD Run this by me first. >:[