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A huge battle is on the horizon in the third season of His Dark Materials<\/a>.\u00a0<\/span><\/p>\n The latest teaser trailer for the BBC and HBO\u2019s adaptation of Philip Pullman\u2019s The Amber Spyglass shows James McAvoy<\/a>\u2019s Lord Asriel building an army to go up against the Authority, the first angel to be formed from Dust and the series\u2019s major antagonist.<\/span><\/p>\n \u201cI am gathering the greatest from every world to help me wage war,\u201d Asriel says in the teaser, before promising that he \u201cwould risk everything to ensure victory\u201d.<\/span><\/p>\n Later in the trailer, the Magisterium is still trying to hunt down Lyra (Dafne Keen<\/a>), as the leader of the shadowy religious organisation instructs new character Father Gomez (Jamie Ward) to find her \u201cdead or alive\u201d.<\/span><\/p>\n Lyra, meanwhile, is back with her mother Mrs Coulter (Ruth Wilson<\/a>) after the events of the season 2 finale, but our heroine seems to be troubled by confusing dreams, hearing the voice of her old friend Roger calling out to her from beyond the grave.\u00a0<\/span><\/p>\n