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Gu Xi outside the city could naturally see everything the undead inside the city could see.
At this moment, he even noticed similar vortices appearing above the Sludge Undead that his subordinates were treating as Experience Packs.
All the Sludge Undead had been locked onto, as if someone were about to snatch them away.
"What the hell?"
Gu Xi was speechless at the sight before him.
He could not understand what had happened this time.
Could the Octopus Head Necromancer in the city have caused some major trouble again?
Just then, a large group of Bone Dragons appeared in the sky near the section of city wall Gu Xi occupied.
This was the first time the Bone Dragon Troop Gu Xi had sent out had voluntarily returned.
Gu Xi's orders to them had been to act freely while ensuring they kept the Death City before them locked down.
Even when Gu Xi had led his troops into the Death City earlier, the Bone Dragons had not flown over to assist.
The four Undead Armies sent in at the same time had done the same.
For the Bone Dragon Troop to fly back so solemnly, something had to be wrong.
Not to mention that the situation before them was visibly abnormal.
The moment Gu Xi noticed this, he stood up.
"Go meet the Bone Dragon Troop and find out what happened. See whether the follow-up reinforcements have arrived. Tell them to hurry. Have the siege weaponry troops prepare to attack—the city may be in trouble.
"No matter what, we must ensure the troops inside have a safe route of retreat."
Under Gu Xi's orders, the subordinate troops that had been killing the Sludge Undead swiftly sprang into action.