His Dark Materials Season 1

In a world full of magic and various magical creatures, all power is concentrated in the hands of the Magisterium. The young niece of the eminent Explorer Asriel, Lyra Belaqua, is in danger. After all, in recent years, cases of disappearance of children have become more frequent. But Lyra is not timid. She's ready to go against the Magisterium. She soon gets acquainted with their peers will come from a different reality, in which there is magic. Two children embark on a magical Adventure through parallel universes...