Shakugan no Shana: Season III Episode 10: Crossing
Episode 10 of 24 of Shakugan no Shana: Season III, aired December 9, 2011, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Sophie Sawallisch comes to assist with a large army of armed humans. Shana breaks free and after a battle against a Denizen, which ends up with Shana furiously killing it, she comes to self-awareness as the ultimate combination of the Flame-Haired Burning-Eyed Hunter - the Flame Haze, and Shana - the human she became after meeting Yuji.