Sound the call of alarm and light the fires in the trenches, the time for war is upon you!
My Queen should be pleased that Aurixia cannot grant me an heir, for if my dragon could give me a child I would have no use for the woman or her dubious charms…
Attributed to King Thyr, from the Book of the Black Rose
A race of beings actually IS invunerable while in adolecence. They age, but cannot be killed. A miniority of the race (1 in 20) does not become invunerable, but rather becomes immortal at some point in thier adolecence, and ceases aging while being vunerable to death in all the normal ways. Another minority (also 1 in 20) Permanatly becomes invunerable after adolecence, but ages twice as fast as the race normally does. There is no known way to test for which of the three traits an individual manifests and the three traits cannot mix, as they are tied to the same gene, as it were.