Absolute Tash

Author at Natasha Von Snape http://ashwinder.sycophanthex.com/viewuser.php?uid=1797.
Also has a journal at http://absolute-tash.livejournal.com/.
Also has a page on fanfiction.net under Natasha Von Lecter https://www.fanfiction.net/u/477001/Natasha-Von-Lecter

Arithmantic Equations as a Second Language (Harry Potter)

Reviewed by Kathryn Andersen on 6th April 2015 (2)
Tags: Novelette, AU Divergent Timeline, Voldemort-wins, Romance, Angst, Worldbuilding, Arithmancy, SSHG2012, SSHG
Characters: Hermione Granger, Severus Snape
(23K, 8873 words)

Summary: Missing memories, alternate futures, and the ancient power of Arithmancy combine as Hermione Granger promises Severus Snape that she is coming to save him.

This story is amazing; nonlinear, a puzzle of fragments, a sonata of numbers, full of darkness and light, wonder and terror, love and sacrifice. I'm not sure what else to say; there is fascinating world-building with its interpretation of Arithmancy, a sense of wonder and balance and otherness with what Hermione does with it, there is the horribleness of a world in which Voldemort won, and the endurance test on both Severus and Hermione to survive in it, and the angst of the sacrifices each of them is willing to make for the other, and for the world.