Looking at Kiriman, Duanmu Huai's expression was calm. If one were to speak of the most heartbreaking loss during Horus's Great Rebellion, it would be the Whisperers' attack on the Five Hundred Worlds.
In terms of direct combat power, ten Whisperers were no match for a single Limit Warrior, so this shameless bunch resorted to underhanded tactics. They secretly sabotaged the defense systems of the Five Hundred Worlds and then launched a surprise attack on the Limit Warrior Legion. At the time, the Limit Warriors' warships were all docked in the harbor, completely inactive, and thus were caught utterly off guard by the premeditated attack from the Whisperers.
The Limit Warriors even held a banquet to welcome the Whisperers, only for the Whisperers to suddenly strike during the event, killing the Limit Warriors who had welcomed them.