A Test of Blood

There had been no portents or prophecies to prepare her coming. No foretelling or forewarning. Yet born in the midst of blood and battle, of death and violence, perhaps that itself had been the sign-The omen.
Discovered by Witch Elves, the newborn infant was swaddled in as much secrecy as she was in the blood of her afterbirth. Named Sha'dara-Joyful Sorrow-her rescuers would soon learn the truth of her enigmatic birth. That it was a violation of all natural law. In contradiction to all their beliefs. Yet Sha'dara was also unnaturally gifted. Possessing a power and potential as unfathomable as her existence.
But if nurtured and allowed to grow, if secreted behind the blood stained walls of their fortress-temple, taught the Witch Elves' deadly secrets and arts, how would she repay such kindness? For so great a risk, would the Brides of Khaine reap an equally untold reward, or their utter ruination? Saved instead of sacrificed, what would this child of contradictions ultimately choose to become? The herald of new hope for a devastated Dark Elf kingdom? Or the harbinger of its final destruction?
Divine or demonic? Blessing or a curse? Without guidance from precedents or seers, with nothing to be gleamed from tomes or divinations, in order to know the child's true origin and fate there was now left only one recourse. One last remaining hope: Time. Only time would now tell.
But in that time, how long could such an extraordinary child truly be kept secret? How long could such unrivaled potential truly be contained, controlled? And once it was finally revealed, once Sha'dara's true power and destiny were known, who would be compelled to stand with her? Or oppose her? Was she ultimately fated to heal and reunite a fractured kingdom? Or finish tearing it asunder?
Yes, only time would tell. Time, and perhaps a test.
A test of blood.
Unless it was already too late?