Complex sentence: Another diversionary storyline begins in 1710, with "Wellspring of Chaos" and "Ordermaster" depicting the life of an unlikely mage named Kharl, which spans the continents of Nordla and Austra and telling the story of Kharl's transition from cooper to order-mage.
Split into simpler sentences: Another diversionary storyline begins in 1710, with "Wellspring of Chaos" and "Ordermaster" depicting the life of an unlikely mage named Kharl. This storyline (which spans the continents of Nordla and Austra) tells the story of Kharl's transition from cooper to order-mage.