The enemy Death Knights had arrived quickly, and died just as quickly.
In less than an hour, every Death Knight that charged over had been slain.
Gu Xi merely used Battle Aura to revive his fallen subordinates, then said to Amirka, "clean up the battlefield. All the corpses here can be turned into Netherblue Knights or Pale Knights—either way, they're yours."
After saying that, Gu Xi headed toward the nearby castle.
At that moment, his Black Blood Knights and Undead Servants guarded Gu Xi's side.
Seated atop the Evil Coffin, Gu Xi fixed his gaze on the castle hidden in the air.
This castle was extremely strange. It could only be seen at a designated time and from a designated angle. Otherwise, even if one went directly to where it was located, there would be no way to find its existence.
Without the castle, the place before them would have been nothing but a plain.
Looking at the spot where the castle had yet to appear, Gu Xi finally understood its nature.
Like the Golden Lion and Silver Snake Cross Gu Xi had seen before, the castle was also a targeted sealing method.
Gu Xi simply did not know what the thing sealed inside the castle would be like.
After all, he had yet to see the castle and still needed to wait here.
After waiting for a while at the spot where the castle would appear, a castle radiating a foul stench slowly squeezed out of the distorted air.
The moment it emerged, Gu Xi's first thought was that the castle looked like a garbage dump in some corner of the Netherworld.
He had never seen such a filthy castle.
From where Gu Xi stood, he could no longer make out what color the castle had originally been.
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