Complex sentence: A new Witchland army, under the command of Lord Corinius, defeats Spitfire and captures most of Demonland, including Brandoch Daha's castle of Krothering, which had been watched over by his sister Lady Mevrian.
Split into simpler sentences: A new Witchland army, under the command of Lord Corinius, defeats Spitfire and captures most of Demonland. This includes Brandoch Daha's castle of Krothering, which had been watched over by his sister Lady Mevrian.