Complex sentence: The "Tales of Xillia 2" manga series is an adaption of the game's storyline and is serialized in Dengeki Maoh beginning January 2013.
Split into simpler sentences: The "Tales of Xillia 2" manga series is an adaption of the game's storyline. It's prelude was published in "Viva Tales of Magazine" It began serialization in Dengeki Maoh beginning January 2013.