Facing the undead army that blotted out the sky and covered the earth, Yun Xuan's expression remained calm.
The longsword in her hand turned lightly.
"Immortal Spirit Swordsmanship, Second Form."
The sword light suddenly blazed!
A streak of white Sword Qi swept out, like an autumn wind sweeping fallen leaves, instantly slaying tens of millions of undead before her!
The undead turned to ash and scattered into the void.
Yet more undead surged forward from behind, trampling over their companions' ashes as they continued lunging at Yun Xuan.
Yun Xuan's feet shifted slightly as she darted through the undead army.
Her sword was fast beyond measure.
With every swing, tens of millions of undead were slain!
Her white robes fluttered amid the gray ghostly qi, like a white lotus blooming in hell, rising from the mire yet unstained by it.
But there were simply too many undead.
One batch was slain, and another came.
They were truly endless, impossible to kill completely!
"Cackle, cackle, cackle!"
The Undead Ghost King's voice echoed through the sky, ringing from every undead creature on the battlefield.
"Useless! My undead army is constantly replenishing itself every moment!"
"As vast as the battlefield is, that is how many undead my army contains!"
"Kill as many as you like, and I shall summon just as many!"
"Your spiritual power will run dry eventually!"
"But I am undying and indestructible!"
The Undead Ghost King laughed wildly, utterly unconcerned that every one of Yun Xuan's strikes could slay tens of millions of its undead, if not more.
The hearts of the experts from the four realms watching the battle sank.
"Just as expected... the Undead Ghost King is far too troublesome!"
"This is simply an unsolvable ability! You can't kill them all, and you can't kill it!"
"No matter