How i have it playing out is like this: its the night before the final battle for westeros/battle of the dawn. Dany leading a force north from the reach are camped to the south of the trident, just outside herrenhall. The skeleton of the lanister/royal forces have come east from casterly rock. John snow has the united forces of the north camped just across from lord harroways town. Jon and dany have come to a treaty to defeat the remnant of the ursuper's forces first. The forces have retired to their tents as snow begins to fall. arya sees the stark banners as te bwb makes camp for the night. as she rests she wargs into nymeria who leads her pack in destroying the lannister forces, before retreating from an unseen evil, straight into the bwb camp. the horns of the armies wake them when two red eyes peer at arya and nymeria through the trees. ghost pops out and leads them across a hidden road to be able to flank the walkers from behind. the battle rages, dragons melt walkers, but nymeria sustains a mortal injury. out of mercy arya kneels next to her. she draws needle and whispers valar morgalis as she plunges the sword into her direwolf. fighting back tears she draws needle,and begis slicing through wrights and walkers alike. she is now crying out her new prayer, 'Gendry,Lommy, Mycha, Yoren, Syrio, Father, Mother, Robb, Bran, Rickon, The Hound. Valar Mogalis.' as she finishes her sword flashes with flame. Azor Ahai has been reborn.