Chapter 90: The Math of Vengeance

"A deal? Do tell," one of the High Command gods said, her face contorting into a sickening, amused smile. "For your soul... What is it you want, mortal? I do not usually interfere in the trivial lives of mortals, but for you, I shall make an exception."

"Once every monster in the region gets teleported here," Yuki said, his voice terrifyingly calm, "High Command must evacuate all human survivors to the Capital immediately. Protect my spatial core and portal while I work... and hand over 50 million System Points upfront."

"Is he insane?!" another High Command god asked, bursting into laughter.

"Well, his little lover just died, so yeah, he’s a bit broken," another chuckled dryly.

"He was always crazy. Trauma doesn’t change that—it just sharpens it. Give him the points. I want to see what he does with them."

"You guys really need actual names," Yuki muttered, glaring at the glowing projections. "It’s annoying when every single one of you is ’High This,’ ’God That,’ or ’Administrator Something.’"

"The titles are made for us, not for you," the first god sneered. "Now get to work. Show us your little trick."

A chime echoed in Yuki’s mind as 50 million System Points flooded his account. Without another word, he stepped back into his pocket dimension.

He walked over to Vee and Kasumi. Without explaining a word, he pulled them into a tight, passionate hug, kissing them both goodbye. Tears welled in his eyes.

"I’m so sorry..." he whispered.

"Yuki? What happened out there? Are you okay? Why are you crying?!" Vee asked, her voice laced with sudden panic.

"I’m so sorry," Yuki wept.

Before Vee or Kasumi could press further, a brilliant spatial light enveloped them both. Shocked and confused, their forms dissolved as they were forcefully evacuated to the safe zones of the Capital.

Left entirely alone in his pocket dimension, Yuki opened the System Shop and began buying knowledge in bulk.

He purchased the complete cognitive blueprints, technical mastery, and mental faculties of Earth’s top experts: a bomb technician, a nuclear engineer, a theoretical nuclear physicist, a high-voltage electrical master, and over thirty-four other advanced scientific disciplines.

The vast, instantaneous dump of information tore through his mind, destroying his mental stability. He traded his sanity for absolute, terrifying knowledge.

To him, it didn’t matter anymore. If a spatial beam capable of wiping out mountains couldn’t put Lykagon down, then a point-blank thermonuclear detonation—executed while she was already weakened—would finish the job. She wouldn’t have time to run. Even if she froze time, it wouldn’t save her; the moment her ability lapsed, the physical laws of atomic destruction would consume her.

Utilizing the time-dilation functions of his pocket dimension, Yuki slowed time inside to its absolute limit while accelerating his work.

The heavy, unshielded radiation of raw radioactive isotopes began to melt his internal cells, while his automatic regeneration relentlessly stitched his decaying body back together in a agonizing cycle of destruction and rebirth.

Yuki’s personality shifted drastically. The warmth in his eyes died completely, replaced by the hollow, terrifying glare of a mad scientist. He paced frantically, muttering advanced thermodynamics, real-world nuclear physics, and Teller-Ulam warhead equations under his breath.

He poured the 50 million System Points into purchasing and upgrading a new Hadron Hypernova V20 Reactor inside his dimension, pushing it to its absolute maximum tier.

Yuki stood before the massive machine, watching the core spin faster and faster until it vibrated like a pulsar, its high-frequency hum echoing deafeningly through the void.

Using his acquired nuclear expertise, he didn’t merely trigger a meltdown—he manually re-engineered the assembly, packing all ten fuel rods into a custom-designed, multi-stage 2-Megaton (2,000 Kiloton) thermonuclear warhead.

By the time the construction was complete and Yuki prepared to return to the real world, his physical body was ruined. His vision was milky and blind, his skin severely scorched, and his hearing entirely dead.

Holding the spatial trigger, he walked out of his pocket dimension, stepping right into the dense center of the regional monster horde.

Thousands of beasts surrounded him in the Citadel ruins. Scanning the area with his ruined, milky-white eyes, Yuki locked onto the towering form of Lykagon.

The Calamity watched in quiet fascination as the walking, bleeding corpse pulled a simple chair out of thin air and sat down before her.

"So, Lykagon," Yuki said, folding his arms and crossing his legs casually. "You’re the strongest one here, right?"

Her voice resonated directly inside his mind. "That I am. What exactly do you hope to accomplish, boy? Do you truly believe a simple explosion can slay me? Or did you intend to make us slaughter one another?"

"No, not at all," Yuki rasped, a hollow smile breaking across his charred lips. "I just wanted to waste your time. You know, there was a famous saying from my world... something about death. Ah, right. I remember now..."

He stared through her as he whispered the words:

"Now I have become Death, the destroyer of worlds."

High above the ruined Citadel, Sky Terror flexed his massive wings, flying upward at maximum speed. He broke through the cloud cover, fleeing the region as fast as his body would take him. He didn’t know what was coming, but if a human mage was capable of mass-teleporting an entire regional army into one spot, who knew what catastrophic spell was about to follow?

Down below, Lykagon watched as space tore open directly above her head.

Yuki triggered a runaway critical meltdown within his maxed-out core, opening a spatial tear right over her lap, and dropped the 2-Megaton thermonuclear warhead directly onto her.

Lykagon instinctively froze time.

...But after using her ability twice already in a single day, her power was exhausted; time only slowed down instead of stopping.

The instant, blinding flash of the nuclear detonation melted her retinas before the physical blast even hit, blinding her instantly. The last vision burned into her fading sight was a dead man who had surrendered his humanity for absolute vengeance.