After finishing Regicide, you will find Lord Zilyana at every guild with his hands on his hips, shaking his head, and facing you. When you talk to him, he will introduce himself as Lord of a Saradominist Military division that was said to be discontinued after the God Wars, but he is still recruiting. He then tells you that he knows and understands you were tricked by the evil Zamorakian King Lathas, and that the only way to make it right is to invade the East Ardougne castle, kill his front lines, then infiltrate the throne room and kill him. He then tells you to prepare for battle (Bring food and good armor, the enemies are stronger than you may think) and meet him in near the bridge of the castle, his men will be waiting.