Sephiroth walks around Deus Ex Machina as he went and burned down the place to the ground.

"This building... is in my way of conquest," he said calmly just as he noticed a giant dragon-like shadow coming on his way which he immediately cuts it down with his sword, Masamune. "So I take it you're the one who summoned this beast?"

At this very moment, he's facing a human who has the same appearance as him; white hair and black clothes. However, he sensed this human is not a human anymore after realizing his power.

He's facing an Inverse Spirit.

"Why yes, I did. Allow me to introduce myself," the man introduced himself. "I'm Isaac Westcott, the Managing Director of Deus Ex Machina Industries."

"So I heard. If you need an introduction, my name is Sephiroth," Sephiroth introduced himself.

"And care to explain why are you destroying my place?"

"Because it's in my way, and a copycat like you should just stay back."

"What did you say?!" Westcott gets angry at being called a copycat.

"You heard me," Sephiroth puts up a pose.

"Wizards! Get this obstacle out of my way!"

The DEM Wizards charge at Sephiroth, who effortlessly swings his sword to kill them at once.

"Must I do everything myself?" Westcott asked irritatingly as he summoned his Demon King, Beelzebub, which is in a form of a book.

Sephiroth charges at him, only for the book to defend him. They exchange blow after blow; Sephiroth with Masamune, and Westcott with Beelzebub.

They jumped a few inches away from each other to make their next move. Westcott summons Nibelcol from the pages of Beelzebub.

"Nibelcol, attack!" the DEM director ordered.

"Yes, daddy!" Nibelcol agreed.

The Nibelcol charges at Sephiroth as he is engaged in a sword fight against them. After cutting down a few of them, another batch came at him, but he swings his sword a few inches away to produce beams of energy to cut them down as well.

"So that's the power of the Demon King: Beelzebub. You knew I would come here to annihilate this place, so this must mean you have the power of omniscience. Then you summoned that shadow-like dragon creature and those girls, so this means you can summon beasts from its pages. Very interesting, but I'm more powerful than you can possibly imagine even if our powers are... incomplete," Sephiroth smirked.

Getting angry, Westcott summons more shadow-like creatures to take down his opponent. Unfortunately for him, Sephiroth cuts them down easily while casually approaching him.

"I'm getting desperate. Ashufiriya: Phantom Library!" the former has decided to try out his trump card. Suddenly, his opponent is being absorbed inside Beelzebub. He grinned. "Let's see if he can get out of that."

"I think I just did," Sephiroth teleported from behind. Caught in surprise, Westcott defends himself with Beelzebub as he attempted to strike him with Masamune. "After all, I can teleport."

The two exchanged blows again and again until he found an opening to stab his chest with his weapon.

"I can't believe this," Westcott coughs up blood.

"Better believe it, my copycat. This goes to show you that I'm more powerful than you can possibly imagine even if our powers are incomplete," Sephiroth said with satisfaction.

Letting his sword go from his opponent's chest, he saw him attempting to cling to life despite his injury.

"Clinging to life, I see. It's time I finish you off. Ruination to all," Sephiroth commented.

Just then, an expanding sun appears and he immediately threw Westcott to it, killing him once and for all.

With the fight settled, Sephiroth leaves Deus Ex Machina with a satisfied grin on his face.