Promethys marched through the streets with an army of Loyalists not far behind him.

"Nucleon." He said.

As if it were a wish of his, the man was tossed to his feet by a few more of the alien Loyalists.

Nucleon looked up at the villain and bowed his head. "Master. You know I am your most loyal..."

"Do you know why I'm doing what I'm doing?" Promethys asked.

"Y-Yes, to find those willing to submit their will to yours..." He stated.

Promethys then knelt down and patted the man's head.

"What am I doing wrong, my disciple?" He asked. Almost sounding truly concerned about it.

Nucleon looked up again at his master. Unbeknownst to him, hopefully, he was his former now.

"You had dozens recruited. Millions remembered my dream I sent out. My call to this world. The human race had thousands of years to prepare for my return yet here I am with no allies... Not even you." Promethys hissed in his deep voice.

"Master... I am most loyal to you! I have been for years!" Nucleon cried out.

"You don't think I have a Quirk that lets me listen to radio and telephone communication?" Promethys asked. "You think of me as stupid?"

Nucleon's eyes widened. "Master, all I ever wanted from you was salvation... Yet all I've seen is destruction, pride, and power hunger. All the things you taught me to hate and let go!"

Promethys sighed. "I thought your race was known for worshipping things you did not understand. That's how they were in the dawn of your planet."

"You're exactly like the monsters you told me to shun. You're a hypocrite!" Nucleon said.

"Care to tell us what you told Miss Midoriya?" Promethys said.

"I didn't say Deku was alive, I swear!"

"I know that... But you told her to prepare for the worst. You gave them a running start from me." Promethys hissed and grabbed the man by his neck.

Nucleon gripped his thick wrist and began to siphon energy from the villain's body in his hands.

Promethys roared and thrusted his arm out to impale Nucleon.

But Nucleon unleashed a wave of energy that blasted from all sides of his body in a rapidly ever-expanding ball of light that obliterated everything nearby, even generating a crater in the ground where they were standing.

Across the city, Shouta Aizawa and the hero Crow-Man saw the blinding light as buildings toppled and smoke built up.

"Something's happening! Promethys has engaged battle with someone very powerful. Energy-based Quirk." Crow-Man reported.

"We have to get back and warn UA. Now!" Aizawa shouted.

The two leapt off of their perches and climbed down.

Back to the scene of the fight, Promethys's body healed from the severe burns the attack gave him. All around were nothing but ashes. Even his army had retreated due to a large number of them being torched and crushed by the falling debris.

Nucleon hovered above the earth with energy to spare.

Promethys looked up and stood tall. "What do you hope to gain from doing this?"

"Slowing you down..." Nucleon answered.

"You were my only hope that this world was ready. But if you won't even join me, I think I'll lay waste to this entire planet and spare no one!" Promethys now roared and jumped up to meet him in the air.

Nucleon blasted him with two green lasers from his hands, but they simply hit Promethys in the chest with no effect as the two bodies quickly collided.

Promethys punched him straight into his chin, sending his body flying higher. He activated a Quirk to let him fly as two large bat-like wings sprouted from his shoulder blades.

Despite the power in his punch, Nucleon quickly recovered and regained control, stopping himself from flying any farther away. This time, he blasted his way toward the incoming villain Bakugo-style, using the force in his lasers to propel him forward.

"RAAAGH!" Promethys boomed until they collided with a shockwave that shattered windows everywhere.

Aizawa and Crow-Man nearly fell over as they ran back to UA, feeling the winds pick up as the two battled in the distance.

Promethys fell back but kept flying while Nucleon was knocked down and crashed into the closest tall building, right through the roof.

He groaned and felt the energy going low now. He was spending too much too fast. As Nucleon struggled to stand, Promethys crashed through the same roof like a knife through butter and stomped his foot on the man's back.

"May I ask one thing before I kill you, why of all things, did you contact the very people who threw your life away in prison?" Promethys asked.

Nucleon grunted and looked up, meeting eyes with the villain. "You've...attacked...something that unites...all mankind..."

"And that is?" Promethys asked.

"...Mankind, of course." Nucleon said. "And not just the people, the very idea. The only speck of society I loved."

Promethys grew a large spike that pointed out toward his hand from halfway down his forearm. "You never understood why I am here. It's why you're no better in sparing than any treacherous, lying human."

Nucleon used the rest of his energy to blast Promethys's face, lifting his weight off of the man. Nucleon then swung out of Promethys's foot and gripped his arm to siphon him again.

The towering pinkish villain gasped and quickly stabbed his spike right through Nucleon's stomach.

"I will spare nothing here... Once Deku returns, I'll steal his power, and use it to turn this rock into dust." Promethys whispered.

Nucleon felt his strength leaving him. All his energy was sapped away. The man weakly pounded his fist on Promethys's arm until the spike was thrusted back out and his body dropped back down.

"Sasaki Nissho. I hereby release you from your debt." Promethys declared, looking down as the man gasped and sputtered, gripping his wound as it caused him to bleed out on the dusty floor.

Nucleon, Sasaki, struggled and writhed around slowly until he stopped and his eyes became still and halfway closed.

Promethys scowled at the betrayal that took place, then jumped out of the building back into the streets.

"Let's march to UA!" He boomed to his growing army of Loyalists. "If I find anyone there willing to join us, I will spare this world! But if not, we will destroy it! Kill all in your path! No prisoners!"

The Loyalists all roared and cheered in their languages as they charged forth, splitting off into the winding and dividing streets.