The Divine Gate
Hecate feels that Shana is a threat to them and should be killed and proceeds to attack her, but Yuji comes and saves her. Meanwhile, Kazumi meets Khamsin and asks him about the meaning behind the Treasure that Pheles gave her, since her feelings towards Yuji are changed after he rejected her. Back at the Serei-den, Yuji opens the Divine Gate, through which he intends to go and bring back the Snake of the Festival's true body and change the world. He then takes Shana and the Trinity with him to announce his plans to all Denizens as they prepare for the war. Then he, along with Bel Peol, Sydonay and Hecate, go through the gate.
Aired 19/11/2011EP 7 - The Divine Gate
Shakugan no Shana: Season III
Continuing from the events of the last series (Shakugan no Shana II), both Shana and Kazumi stand at their respective locations waiting for Yuji to meet with one of them, only to discover that Yuji has disappeared, with not even the slightest evidence of his existence left behind. All is not lost however, as the letters the two of them sent to him still give hope of Yuji's continued existence. As Shana and company search for answers on Yuji's whereabouts, they soon find the truth staring back at them when Yuji reappears in front of them as the leader of Bal Masqué. Left with little choice, Shana must now confront her most unlikely adversary on the battlefield in her toughest challenge yet.
(Source: Anime News Network)