Time rewound to a few days ago when Du You and his team had just entered the battlefield.
The Undead in the Chaos Lands were overjoyed upon receiving the news. Such a powerful neighbor dared to undertake a death-seeking act. Once they entered the battlefield, communication with the outside world became exceedingly difficult.
Thus, these creatures, sticking to their original plan, rushed toward Du You's territory one by one. They obviously knew where the core territory was, for it had the most buildings and the highest number of Undead.
Of course, the Lich King wouldn't allow these fools to cause trouble in this place. It was precisely because Du You had advanced to tier six that the Lich King could venture so far from him; otherwise, he would have been summoned back much earlier.