Tyrant Xilian enters the Undertale Universe

Dust sans was walking down the judgement hall, looking around only to then get stopped by a voice from behind. "Now where do you think you're going, anomaly?" The voice resembled Alphys as he then turned around. Dust sprinkled off of Dust Sans's shoulder "A-Alphys..?" Alphys, looking with a distasteful gaze approached, her lab coat shining as she had concoctions on standby. "You think you are the only person here with LOVE? Please, don't make me laugh." She kept a rather disturbing grin across her face, as you could see parts of her face moving at itty bitty lengths.

Dust, unfazed, but on high-guard muttered to himself. "Did she inject herself with experimental determination..?" Alphys let out a loud and crazed laugh. "Nonono, don't back away now! I want to test more experiments, I WANT TO SEE JUST HOW FAR YOU COME!" Her eyes opened widely as her footsteps became faster, behind her, the sounds of faint low growls also echoed as Dust jumped back. "Back off freak, you aren't fooling me." Alphys stopped in her tracks, stomping the ground causing miniature cracks to form from the force.

"T-Trick you? No, I wouldn't do such a thing..I- I just want to try out this new mixture on you!" Dust looked at the needle she had. He saw the color of the liquid within it, as it looked dark gray with mixtures of red colors as well. "That's not.. That's not determination, what the hell did you do with the monsters of this timeline?" He aimed his arm forward as a phantom apparition of papyrus appeared next to him. "BROTHER, WHAT HAPPENED TO HER?" Dust eyed his brother, responding quietly. "I don't know paps, but I think we can guess who caused the extinction of monsters here."

The six amalgamates came into view that were hidden behind Alphys, their shapes forming together as they looked more fledged out than the original timelines amalgamates. Dust, confused, could feel their determination radiate out of their body. "The hell, this isn't normal, no monster should be going through that pain." Dust then formed twelve blasters which fired highly concentrated beams of energy infused with his own determination. The determination within the beams amplified their power, however, as soon as an amalgamate got hit, they absorbed the determination from the energy beam into themselves.

Dust's eyes widened in shock. "Huh? That's-" He quickly had to dodge to the side as Reaper birds extended their neck to bite Dust. He summoned a bone and stuck it straight through the Reaper bird's eye. The amalgamate screamed out in pain as it started turning into unstable determination. Alphys, smirking the entire time, pointed a specialised weapon towards the decaying Reaper Bird "Come back~". Out of the blaster-like weapon, a red beam was shot out which made the Reaper Bird slowly reconstruct itself.

Dust looked at Alphys, shouting, clearly angry. "Whatever you are doing, IT'S WRONG, stop torturing these poor monsters..!" Alphys's smirk faded as she glared at Dust. "You hypocritical sack of bones. What about you? You are at LV 20 and yet, you don't see ME complaining!" Alphys then pointed her finger at Dust, as the rest of the amalgamates charged towards Dust. Summoning a ring of blasters around himself, he completely destroyed the judgement hall as they all then fell across the air. Alphys, took out a needle, stabbing it into her arm as she infused herself with more determination.

Dust teleported, seeing gravestones everywhere and all that was left of the kingdom was nothing but a massive cemetery. Getting serious, his eye flashed, unleashing a bright flame that erupted from his left eye.

Dust Sans LV20

HP: 99

ATK: 99

DEF: 10

*A man that took matters into his own hands.

Summoning a spear, he then charged it up with mettaton's energy as it surged bright electricity. "Eat this, you freak of nature." Dust said, throwing it which released miniature yellow beams of light all around it as well. Alphys looked up, the landing not dealing any damage to her due to the determination as she ordered the Amalgamates to form into a shield around her. The spear went through all of them whilst also getting rained by energy projectiles. Alphys looked in disbelief, the amalgamates melting away slowly as the projectiles broke all the vials in her cloak.

She screamed out in pain, her white soul getting a purple tint to it as it grew a large blister, the blister opened up, eating away at her insides. She grabbed her face only to have her fingers dig into her face. As all the mixtures finally seeped into her melting body, the leaking determination of the amalgamates slowly seeped into her as her eyes turned white with bloody veins popping from all over them. Her spine elongated with grotesque bone crunching noises echoing through the open space. Her size grew in bursts as her torso was completely opened up, showing her internal organs and her SOUL.

Crazed Alphys LV 20

HP: 32000

ATK: 40

DEF: -200

*Taken over by the lust and hunger of experiments.

Alphys tried moving, but her bones couldn't hold up her body so she just cried out. Her voice was completely muffled of agonizing pain, but you could feel the agonizing pain she felt. She was unable to form out proper sentences as her mouth had melted to such a degree that she couldn't open it. Dust looked at the living corpse that was being presented in front of him. He couldn't leave her in such agonizing pain, nor could he get any fear from her, as this timeline was long gone. "I promise to make it quick."

Dust summoned a massive blaster above Crazed Alphys as he fired down, her body being fried and vaporized slowly, he could feel her health rapidly drain as once the blaster stopped firing, there was nothing left of her, but her soul. He floated down towards the soul, grabbing it and stabbing it with a spear. "Goodbye." Said Dust, as all the LV Alphys had gathered absorbed into Dust. His body surged with power, as his face could barely be seen now. His body flashed to an evolutionary state he hadn't reached yet as it almost resembled his current state but much darker.

Nightmare's glob was looking at all that happened as his eyes squinted, being more weary of Dust.