Xilian looked at Mettaton Supreme, his wrists lifting up from their stationary position as he pointed his bone finger towards him. The Royal Abomination let out a thunderous roar which vibrated the dark matter, it launched itself forward with its deformed arm causing a violent tremor. Mettaton flew back as he swung one of his claymores, a white-blue like air slash cut through the abomination as it went straight towards Xilian.
The beacon pulsed as the wave of light pushed back the lightspeed slash causing glamourous flames to spark everywhere, the Royal Abomination was now cut in two as they duplicated as a result, its stats remaining the same. The abomination released thousands of Royal subjects as each one started lunging towards Mettaton.
Mettaton spun around so fast he started releasing stardust gas all over, vaporizing everything around him "Hah, is that all you've got darling?~" Mettaton spoke, his voice reverberating. He then threw one of the claymores towards one abomination as it went right through him. The Abominations wound sealed itself as Mettaton stopped spinning, he moved so fast that there was time dilation.
"What to do with you..Oh, I know! I'll give the audience a wonderful light show!" Mettaton said, as the claymore he threw went back to his hands. His vents exhumed the white smog as his entire body radiated a bright lavender, he then cut at such speeds that he cut molecule by molecule, making sure there was nothing left of the abomination.
Whilst it felt like a second for the Abomination, it was hours for Mettaton as he went on to sit on the other abominations head, the time dilation going back to normal. The other Royal Abomination then blew up into color-changing sparkles, the same sparkles which exhumed out of him. "My, my, what a beautiful change!" He said mockingly, the particles purifying the dark matter.
Meanwhile, due to Mettaton's body heat, it began to melt away at the abomination as it started falling apart. "Oops.~" He said, aiming his arm down as he formed a massive cannon, firing the abomination into oblivion, vaporizing him completely. The dark matter struck by the beam absorbed the energy into it, dispersing it as he accelerated the spread of the dark matter tenfold.
Mettaton's eyes widened as he grabbed ahold of his claymores, merging them together into a gigantic Zweihänder. The souls within him spun in his reactor core as he unleashed a soul beam which dispersed millions of the purifying sparks around, Mettaton swung his Zweihänder forming out hundreds of Claymore apparitions which cut into the ground and forming a mighty forcefield around it. "Eat this!" He said, as thousands of wide and powerful cuts started swinging all over inside the forcefield.
Xilian was inside the forcefield, his throne being cut and torn apart with the jewel remaining intact, Xilian's clothes also started being cut to ribbons as it started cutting the cloth around his head. He let out an otherworldly groan, covering his face, as his bones started being cut by the holy cuts leaving behind light cuts on his skeletal form.
"Ohoho~ You don't like showing your face darling?~" Mettaton teased, raising his Zweinhander into the air and slamming it down with such force it completely ripped away the barrier as a result, the planet seeing better days as his Zweinhander had accidentally cut straight through half the planet, leaving a massive cut into the Earth's crust.
Xilian was cut down in half as a result, his face being blocked by what looked to be black boxes, similar to how high tier angels have white boxes covering their face as it would be too incomprehensible to the simple minded.
Sans looked at the top of the mountain, noticing it cut straight through, the sunlight beamed into the dark cave as the soft heat of the sun glistened down onto Mettaton. Dust and debris fell down from the sky, as the top of the mountain was getting unstable, a gargantuan chunk of rock fell from the sky, exposing the entire top of the mountain. Asgore aimed his trident as he threw it across the sky, getting engulfed by flames it completely annihilated the mountain top which fell into the cave, resulting in some of the rocks to turn into molten magma and boulders.
Houses got crushed under the debris and covered in magma which started to cool off quickly. Mettaton remained calm, the boulders just bouncing off of him as they didn't harm him in any way. Asgore looked at Sans and said. "You know what to do." Sans just nodded and teleported out.
Asgore looked down at the opening, seeing that they were essentially free from this imprisonment, but at what cost? Hundreds of monster homes destroyed and portions of his castle broken. "Oh Toriel..If only you were here." He clenched his fist and the trident that he threw came back to his hands. "At least this madness is over."
The sound of echoing laughter was heard coming from the judgement hall "Ah-ah-ahh~ I wouldn't be so sure fluffybuns." The voice was overlapping with other voices, it was dark, sinister and made Asgore's soul tremble.