Elder Blood

From Witcher Wiki

or did you mean the book "Elder Blood" ?

[edit] Glossary Entry

A genetic program initiated by elven mages (known as Sages) for the purpose of creating an extraordinarily gifted child whose power would exceed their own. According to the prophecy of the elven diviner Ithlinne, the Child of Elder Blood will one day save the elves from annihilation. However, the last carrier of Aen Hen Ichaer, Lara Dorren aep Shiadhal, bonded with a human instead of an elf, thus shattering all plans regarding her offspring.

see also Old Races