31st May, 71 BNM
Late Evening
20 miles north west of crystal empire
Frost mountains, Ravine

Flying through the mountains, they came to a ravine, scarred with crevices that stretched into and down perilous depths, snow and rock marking them everywhere. Coming to a sudden stop, Stasrwirl loudly ordered the other 6 crystal guards, 4 Pegasi and 2 Unicorns, who escorted him.
"Stop, they're here!"
Looking around briefly, the leader among the guards, a lightly built Pegasus stallion, remarked gruffly:
"There's nothing here Wizard!"
"Below us, they're in the caverns. Down there."
Starswirl elaborated as he pointed towards the nearest ravine, a great gaping wound in the mountain side that stretched down into dark depths. As the other guards swiftly peered down, they saw the darkness, and the silhouettes of jagged rock and crystals marking its innards like rows of teeth:
"Won't we get lost?"
"Not if you follow me."
Upon hearing the Wizard's reassurance, the guards readied to head down. But in the distance, a rumble of distant battle, and lights that were of yellow and white variety, rumbled overhead. Knowing what was unfolding now, and possibly more soon, the Wizard warned lowly to the guards as he imbued himself with blue magic to hover down into the crevice's depths, the cold biting at his flanks the least of his concerns:
"We must hurry! And be wary of an ambush, there's one being unaccounted for still!"
The Wizard's words echoed as they all rushed down into the crevice, Starswirl's blue lighted way guiding them into the depths, with Pegasi flapping and Unicorns hovering into the depths.
Jagged crystal shards were everywhere, as well as dark rock and fewer and fewer traces of snow. Were it not for the light of Starswirl and the 2 Unicorn guards, by now they would be in utter darkness.
But as they pressed on, Starswirl felt the magical signal he knew was that of the Princesses getting stronger. They took turns through the cavern system as if they knew which way they were going, as Starswirl led them on into the cavernous depths.

Frost Mountains foothills

"Rally positions, keep the ranks tight, fight together! If they try and come for us let us not make it easy for them!"
The Crystal Guard Commander bellowed to her ranks of a few hundred that stood at the foothills, forming closed ranks as they readied their magic horns, crossbows and swords for battle. An air of unease was about the ranks though, as word had spread of a potential new enemy incoming.
All eyes were facing north, to the thundercrack echoes of the battle unfolding between the Queen and Councillor Sombra.
But as her eyes turned, the Commander's eyes flickered to a pebble on the mountainside, as a single rocking shockwave through the ground made it jostle suddenly, before settling.
A few cries went up, as she turned to see a crash in the distant snow plains, heading for them. Whatever caused it, it had landed as many miles south of them as it had west of the Crystal Empire.
Barely visible, it was an upright standing figure in the snow dust he'd kicked up from his meteoric landing. But it was too far away to make out.
Squinting her eyes, the Commander and many others in her ranks saw a faint red glow fading off of the creature.

5 miles south of Frost Mountains, 5 miles west of Crystal Empire

He stared at the Empire, a beacon of energy, of life.
He scowled, disgust and rage consuming him. But as more cracks came from the north, echoing across the skies, Odi-Viscer turned to the Frost Mountains. He sensed the others both like and unlike him there. One in battle, the other hidden.
But as his red hued gaze glanced to the foothills, he saw them. Soldiers, a small army, armed and ready, staring at him. They squinted, unable to see him in detail. But he saw them easily, his own vision enhanced.
His frame shook in rage and excitement almost, as he crouched down and leapt, cracks erupting in the ground as he took off in a titanic leap yet again, like so many he'd already done to travel this far north.
He soon left the distasteful sight of the Empire far behind.

Crystal Empire, castle upper levels

Staring from the castle's balcony, Princess Amore couldn't help but gaze in horror as the mysterious creature leapt across the plains like a demonic flea of some sort, heading right for the armies of hers.

Frost Mountains foothills

"Get down!"
The screams went up as the boulder-like creature impacted on the slopes just below them, a hundred metres from them, forming a small crater if snow and rock on landing. Snow flew up, a small cloud billowing as the hundreds of guards stood ready. Suddenly the rumbles of battle in the mountains, which had admittedly suddenly gone more distant, were forgotten.
The red eyed creature, shaped like an ape but devoid of fur, only with bone and stone as features from his bald grey skin at the joints and vitals, stared at them blankly, head cocking very slightly as he watched them.
"Hold..."
Her words rang out over the tense ranks of a few hundred guards, as the Earth Pony mare slowly sheathed her sword, looking as non-threatening as possible.
"I know tales of this beast from the south, none have tried words yet..."
"This is no time for negotiating!" One of her sub-commanders whispered harshly to her as she advanced, to which she replied:
"Fighting will get us nowhere here or in the war. Alternatives must be tried, or we're no better then animals."
As she advanced, the soldiers in her ranks were tense, weapons ready, but she advanced with weapons sheathed. Slowly trotting down the foothill slopes, she slowly saw more and more of Odi-Viscer's body in detail.
He was four times her height, possibly five, and every one of his joints was marked with sharp protrusions of bone and stone, and his ape-shaped body armoured in all but the non-vital areas with stone-like bone.
Appearing as non-hostile as she could, she removed her helmet and deposited it on the ground. She knew full well that if this went wrong, it would be useless anyway. But she had to try.
"Are you friend, or foe!? What do you want? We wish none of your wrath, only to protect what we hold dear!"
Staring at this slowly advancing Earth Pony mare clad in crystal armour, Odi-Viscer let out a low rumble as she stood before him, sword sheathed, staring hard into his fiery red eyes with her own.
Ever so slowly, Odi-Viscer's foreleg shuffled forwards towards her.
And ever so slowly in turn, the Commander mare took a step backwards.
At that same moment, an arrow twanged as it flew from a crossbow, and clattered as it deflected and broke off of Odi-Viscer's bony eyebrow.
At that instant, his eyes constricted, and his fist flew outwards.

The Commander couldn't scream as the fist seized her, her skeleton and body crushed before the air could leave her lungs to make a sound, as he hurled her mangled body at the armies, flattening two soldiers up on the foothills with the thrown body, speeds not even the fastest Pegasi could fly at.
A hail of spells and arrows flew his way, as the armies scattered like a flock of birds. Unicorns teleporting in all directions with Earth ponies in tow, and Pegasi flying off in all directions too.
Spinning to the largest batch he could find, Odi-Viscer roared for the world to hear, as he charged them, leaping forwards with a ground cracking leap with outstretched arms, red energy building inside his forearms and his mouth as he charged them.
Right as he was upon them, the guards fired arrows and spells at the monstrocity, red light consuming them as the first of many small earthquakes arose from their own, and many more to come, demise.

Frost Mountains, quartz valley

Yet another volley of yellow energy spheres shot her way, as Aurora saw each sphere still detonating behind her in a trail intent on consuming her in one of the blasts.
Flying above her, the 4 winged draconian centipede fired away with wild abandon, any strategy forgotten as he unleashed all power he had. In turn though, Aurora had been forced to abandon her own strategy, hoping she could find some way to get a clear shot without being blown back or into a mountain by one of Golmov's attacks.
"You cannot run forever Queen! Nor can you hope to best me, even with all your power!"
Her wings beating furiously, Aurora instinctively put up a shield barrier as a stray yellow beam arced her way, Golmov cutting her off long enough for the trail of detonations, now cascading along the mountain side, caught her up.
Her white shield shattering mid blast, the Queen yelled out as the mountain's snow covered slopes rushed up, her form skidding along until she slipped down a crevice. Coming to a staggered flapping a few metres down, Aurora saw one of the many deep crevices, almost like a labyrinth going straight down, looming beneath her. Jagged rocks and crystals lay everywhere.
Overhead however, the rumble of Golmov's wingbeats filled the air, as he landed with his limbs splayed on each side, yellow energy building in his mouth as he reared up above the crevice.
Suddenly, black, smokey magic shot from the side and into Golmov's eye, earning a shriek from the full sized dragon creature, while the culprit then fired a barrage of sharp crystal fragments encased in black magic out, piercing Golmov's left forewing so many times it formed a tear in his wing.
Reeling away in agony, the massive dragon was blinded by this surprise attack long enough for Sombra to fly down into the crevice on a plume of black magic.
"My Queen, we have to go!"
"Obviously Sombra, but you are welcomed. He is right, I cannot beat him or any of his others alone."
"Ideas would be good, you've fought him for a long time now."
"And I have one, with this place being perfect... His greed, it is perfect with what lays below us."
Glancing down, Sombra noticed the twinkling of the crystals farther down in the crevice by way of Aurora's magic. His own teeth sharpened slightly at the enticing sight, but he shook his head, agreeing with her plan.

Seeing the black Unicorn hovering above the crevice he'd just been about to blast apart, Golmov saw Sombra waiting for him:
"You will not have such luck again Unicorn..."
"Try it creature..."
A distant red explosion suddenly caught Golmov's attention, as he then added cruelly:
"Perhaps you may want to redirect your efforts, to that of your army's survival against HIM."
At this, Sombra turned to see that, indeed, a red hued light burst was vanishing from the mountain foothill area. But sparing a quick lance down into the crevice, Sombra fired a few volleys of black magic at Golmov as he fled, the Unicorn making a hasty retreat towards the more dangerous looking creature.
"Coward, but smart for it." Golmov spat. Glancing towards the crevice, he realised that Aurora had hidden far down inside it, and with a flash of yellow, he was now smaller, only 5 times her size.
His 4 wings/hands grasping the walls, he scuttled down, his eyes letting him see well in the dark as he descended. As he smelt Alicorn, he rumbled aloud into the dark crevice:
"You continue to flee, yet you and your ponykind preach of justice! Your daughters took everything from me. My treasure, my crystal heart, my pride! I was forced to live in shame, chased out of dragon meets like a pariah. Only the Savant's arrival offered me a chance to strengthen, and have my own justice!"
"You have this power to find what wealth you wish, yet you obsess with revenge. You do not make sense beast!" Aurora's cruel rebuke didn't phase Golmov, stating himself with utter simplicity in intent, not an ounce of deceit:
"It is the principle that counts."
"Everypony, or dragon, has their price. Enough wealth, if you are willing. Allow me to illuminate you..."
With that final word, Aurora's white magic shone out, and all around them in the vast crevice the massive walls, lined with shining crystals and veins of metal glistened in the crevice's reflective lit expanses.
Golmov's yellow eyes widened slightly, as he realized just what exactly he had missed in decades, even prior to Siral.
"All this, and the power he gave you, it could be yours, treasure no dragon has claimed."
"All, mine...."
Indeed, as he gazed about, he saw the many twinkling crystal heads, reflecting his own face. Golmov's yellow eyes turned wide with desire, the draconian desire to hoard so strong now. The reason Dragons never went for these crystals was due to how difficult to manipulate they were. He had no such problems now.
But a flicker of reason, or his old self, came over Golmov as he advanced straight down, his mouth wide with yellow energy bristling in it as he charged the hovering Alicorn and the source of the light here:
"Yes, mine to have, but the principle remains."
His jaws snapped down, but felt only air, as Aurora's entire body vanished in a white flash. Not a teleportation, but an illusion. Plunged into darkness, Golmov whirled around to see a silohuette of an Alicorn much further up the crevice, flying to freedom:
"WHAT!?"
Exclaiming his outrage, Golmov shot a stream of yellow energy, and normal fire, up the crevice's depths. But with a large white burst overhead, Golmov saw a cascade of boulders come crashing down into the crevice, plunging him into darkness as the first of them landed on him.
As he was pinned down, he bellowed out loud form pain, but mostly outrage. This would not trap him forever, he would soon be out.

Quartz valley

Flopping upon the snow covered hills, Aurora knew Golmov wouldn't be trapped for too long.
But as she heard the carnage unfolding towards the direction of the large explosion, even as she subconsciously worried over her daughters' fates, she just felt so tired and weary.
Nearby, the first rumbles of Golmov breaching his way out of his buried, failed tomb shook her frame as she lay on the snow covered ground. She wished she was numb to it after so long, but she wanted Golmov dead as much as he did her.
As she lay there, recouping her strength, she began to formulate a final solution to Golmov.

20 miles north west of the Crystal Empire
Frost Mountains
Crystal Caverns

They found them, both of them, with no sign of Teal Quirt or anybody else.
The 6 guards chipped away by pick or magic in the Unicorns' cases, as the Princesses's eyes flickered about desperately while more cracks appeared in their prison. Before them, his blue magic working to help break the enchanted seals on the crystal prisons, Starswirl had felt the tremors above form more than one battle now.
"Make haste, the next creature wreaks havoc as we speak!"
But as he spoke, he suddenly sensed something. A presence he hadn't felt since...
"Chack.."
He nearly faltered in his blue magic casting as he felt the Salamander in the vicinity, close to the heart of battle. And now for once, Starswirl was fearful for the Salamander's fate.

Frost Mountains foothills

The foothills were in carnage, as boulders had been burst apart, scorch marks and craters and cracked rock fissures had formed were Odi-Viscer went on the warpath.
Ripping the slab of displaced granite from the ground, the creature hurled it skywards like a discus, the spinning slab catching one Pegasi enough to flatten him on impact as it soared away to crash a half kilometre away.
Arrows and spells rained down as they all flew like gnats around him, and more and more, despite him trying to hit them, he couldn't deal with them fast enough for his liking.
Red energy shot from his gaze, carving a path out of the sky but missing as the Pegasi were too fast and manoeuvrable for him to hit. Carving his energy blast down to the ground, the Unicorns and Earth ponies merely teleported about, infrequent enough to be able to keep it up.
As more attacks rained down upon him, Odi-Viscer felt his energy building with his rage. A volley of arrows managed to actually imbed into his leg, irritating him. A red glow began to build in his chest, the tips of his spikey protrusions beginning to glow red too.
As he was bombarded more and more, he clutched his forehead and chest, feeling an intense burning as he sucumbed to more and more anger.
He wanted these vermin who dared make his life more hell then it had already been dead, now.
Hurling his hands skywards, he let loose an earth shattering roar as he hurled his fists down, red glows focusing in within their fingers like many small red stars concentrated within them.
The moment they connected with the ground, red lightning and a single massive shockwave filled the air.

All around him, ponies flying and moving about were incinerated, flesh stripped and vaporised to leave the skeletons intact for a brief moment, before they were blasted apart by the force of the magical and strength based explosion.
Odi-Viscer sunk down as his attack formed a large crater, but from him, a crashed to earth red star filled the air, as all that was alive was reduced to dust, the intense energy disintegrating anything and everything that was living, and blasting apart anything not made of organic tissue.
As the red ball of energy expanded, the red lightning, disintegrating energy and shockwaves spread out in all directions, only beginning to truly lose potency once a half mile radius had been cleared from Odi-Viscer.

Crystal Empire, castle upper levels

The red light engulfed the plains, as Princess Amore silently saw the blast come from where her armies had been engaging the creature.
"Oh gods..."
Like a fading aurora concentrated on the ground, the red energy dissipated in the air in the distance, as the rumble of the explosion finally reached the empire. She hung her head slightly, knowing full well how many wouldn't be coming back today.
"How will the bards tell of this event I wonder?"
She mused this aloud, as she felt helpless in all of this. She was not a combatant, and had to exercise her magic with the now hidden crystal heart in case one of the creatures came directly for the empire.
"Be safe Sombra, and my Queen..."
She could only hope her words carried to their intended ponies somehow, and that the Empire would be spared the carnage unfolding in the north mountains.

Frost Mountains foothills

Flying on his black plume of smokelike magic, Sombra saw the devastation around the foothills of the Frost Mountains.
There, standing in the middle of the carnage torn landscape, stood the creature responsible for so much death and destruction, past and to come. His eyes followed Sombra from a half mile below, bright red as they glowed.
A fierce beam suddenly shot forth from the pair of eyes, as Sombra dove away mid flight to avoid the beam as it arced across the sky to slice him asunder. Flying low to the ground, Sombra flew close to the ground, black smoke trailing as he merely kept sensing his opponent's strengths.
The red glow inside Odi-Viscer's chest didn't diminish however, as he sensed the magic this individual possessed. Raising a foot, a spikey tip extending, he thrust it into the ground, red energy cracking it as it shot forth like a lightning bolt through the snow and rock covered tundra.
Sombra saw the crack intercept him too late, as the ground exploded beneath him to catch him off guard. His black magic protecting him, Sombra painfully landed in a rolling heap in the snow, mane dishevelled as he got to his hooves.
An unnatural roar sounded from beyond, as snow exploded a few dozen metres from him in a crater forming impact. Having leapt towards him, Odi-Viscer loomed up, red eyes ablaze as the energy also crackled around his spiked fists and knuckles, the ape-like creature with bald grey skin, stone and bone spikes and armour glaring at Sombra.
Red light filled Sombra's vision, as Odi-Viscer unleashed his full attack from his mouth and eyes.
But a green flash pierced the air right before this, as an unknown being had leapt from higher up to land between them, and slashed something that formed a cut in the air itself. Odi-Viscer's blinding red blast was sucked through the sliced wormhole, and reappeared in a second that was 30 feet away, right behind Sombra, the exact same direction it was going for, but now with a safe gap for Sombra and his saviour.
As the red glare vanished upon Odi-Viscer ceasing his attack, Sombra glimpsed the dark red armour clad Salamander, shorter then he, brandishing the glowing green sword he held in his hand, the rip in space vanishing too
Not giving Odi-Viscer a chance to absorb this act, Chack slashed out the green blade, a slicing green energy wave hitting the Being of Wrath's eyes, not enough to blind him though. Staggering backwards, the now 5 pony tall creature roared as yet another newcomer fired a powerful bronze beam into his side, ploughing him into the snow up to 50 feet away.
Coming to a hovering stop before them both, Aubelles landed next to Chack, remarking to Sombra, who couldn't take his eyes off of Aubelles.
"This thing, you were a fool to target it alone."
"You are Nationalist, why are you helping? And who are you?" Sombra first asked Aubelles, and then Chack, these earned queries.
"These creatures are enemies to all, don't get used to this Councillor."
"These creatures all have their weaknesses. We just have to find this one's." Chack pointed out, flicking some snow from his sword that had settled as he let Aubelles talk down to Sombra without a care of his own.
"Dying might be it." Aubelles suggested coyly, as he saw Odi-Viscer scrambling to his feet, a red hued fist punching the snow as he reared up, tall enough to make Aubelles's smirk vanish.
Turning to face the Alicorn, Unicorn and Salamander trio, Odi-Viscer crouched down, and charged, snow exploding behind him as he surged towards those three.
Scattering, Aubelles and Sombra firing waves of magic as they took off, Chack ducking and letting another slash of green magic hit the creature's shoulder, to little damage, while ensuring passive shields were at full power from his blade's magic.
Attacking these three, Odi-Viscer's ferocity increased with every moment, as the red glow in his chest intensified with every hit he took, and every hit or miss he dealt. Every second he fought, he grew more powerful, and they grew weary.
To fight him was to admit defeat, that was Odi-Viscer's strength.

Author's Notes:

Sombra in his better days, enough said.
Golmov is out for now, lured by his avarice, but Odi-Viscer brings a new level to this theatre of battle, within minutes claiming hundreds of lives in a single burst atop a few he took out singularly already.