Upon Mt. Charcoal, Live Only Monsters

Both Fog and Yaeger watched as this warrior, cloaked in black mist, drove his blade through their master's chest, his golden solar blood spilling onto the ground. The warrior lined up his fist to punch the blade fully through the hero but was interrupted by the few Lesser Guardians ripping him away from Polaris. The warrior and his party regrouped, with hope gleaming in their eyes of the sweetest victory within their grasp. 

However, the mage of their party shrieked with a bone-piercing scream as the Grand Elder Guardian, Yaeger, ripped their archer's innards completely out. The group looked up in horror to see the brass-colored being slowly turning toward them, his amber-colored lens now turned midnight black. His body reconfigured into his defense form. Six arms, two creating amber colored lighting, two with tools that could only be for dissection, and the last two had hands of talons sharp enough that touching them to a diamond would shatter said diamond without any added pressure. 

"Come everyone! We killed its master! We can kill this godless creature!" Called out the warrior. However, none had ever heard a guardian speak, let alone the Grand Elder Guardian. "Master..." The party backed away in horror of this abomination of nature. Still, as if his appearance wasn't enough to kill even the strongest warrior's resolve, his voice was far more metallic, far more twisted and split into something demonic at its core. 

"No... No victory. You shall only know true fear and defeat. Come... allow me to deliver you to death... MYSELF!" Yaeger's movements were faster than they could have any hope of tracking, even with mana detection. Within their party, there were six members, five after the nightmare-ish guardian had torn the innards out of him. There was now a mage, a warrior, an assassin, a thief, and a paladin. However, knowing their classes, strengths, and weaknesses, Yaeger grabbed the Paladin, mid-healing prayer, and bludgeoned her against the rocky soil of the mountain until nothing remained of her. 

Meanwhile, Fog cradled Polaris's head as Fort Wilderness shook violently. The massive explosions sealed the fort's fate, and it was doomed to collapse into ruin. Polaris grabbed Fog's hand and simultaneously cast one final command, as well as equipped the Voltz Gauntlet, a relic of fort, onto Fog's arm. 

"Y-you are free... now..." Mustered Polaris as he took his final breath. Fog stood up, eyes without their normal green color, for it had been replaced by white glowing dots. In a fury of blinding rage, Fog instantly teleported in front of the retreating party, Voltz Gauntlets fully activated...

As Yaeger lobbed boulders at the fleeing party, Fog directly intercepted the warrior of blackened mist with a sternum-centered punch. The shockwave alone disintegrated stone and soil alike, shattering bones within the warrior he'd never thought he'd break. The whole party froze with fear as the seemingly tame butler's glasses shattered on his face from the physical energy emanating from him. A few screamed in horror, and another vomited in the face of true, unbridled revenge. 

"My master..." Started Fog, "was a hero kind enough to show humanity kindness and grace..." The Skeleton grabbed the assassin by the throat, raising him off of the ground. "AND YOU FILTHY VERMIN MURDER HIM? I WILL NOT LET ANYONE LEAVE THIS MOUNTAIN ALIVE!" Fog crushed the Assassin's windpipe with ease and discarded him like he'd never been a threat at all. 

As the Black-Mist Warrior sat up shakily, his eyes widened to find his party had been turned into blood-pulp; crimson red blood stained the soil and the rock, and even he was covered in the carnage. "Just who the hell did we piss off..."

At that moment, the Grand Elder and the Skeletal Brawler appeared in front of him. "He is Yaeger, Grand Elder of the Battle Tower Guardian race." Spoke Fog. The warrior's eyes widened in a flurry of fear. "B-battle tower guardians... you mean..." 

"Yes." Growled Yaeger, "the race that single-handedly stacked more humans, villages, and cities higher than any of the other races combined. He, the undead skeleton with me, is singlehandedly responsible for ensuring the fall of the Greater Dragon Empire, the Lesser Demon Union, and the United Angelic Archipelago."

The warrior clutched his heart, his mind fully overcome by fear. Fog began to laugh with a monachal laughter that would have driven even the strongest-willed heroes insane. His laughter was then followed by an instant, maddening silence. "Burn". Spoke Fog, instantly setting the Warrior ablaze in white fire. "As you lay there, writhing in the fires of the underworld, know your soul will not move on, not reincarnate, as there will be not one escape from this dead mountain. Polaris said you were strong, but I am well beyond strength... I am... Power Incarnate." 

The warrior's fried corpse disintegrated into the wind as Fog and Yaeger made their way back to the ruined fort. Upon arriving, they cleaned Polaris and buried him with the other fallen heroes. As they were about to trek down the mountain, a faint voice from beneath the rubble called out to them. Yaeger and Fog hurriedly dug down to find a half-clothed physical spirit looking up at them. Her eyes had the Crest of Wilderness engraved onto her pupils, a beautiful lighting blue and golden mixture. 

"How did you end up here, Greater Spirit?" Asked Yaeger. She tilted her head, then spoke. "I am Wilderness... You are Yaeger, Grand Elder Guardian, and you are Fog Carne, last living member of the Carnage Dynasty, and the last Hero of Wilderness. Both of you are servants to my former owner, Polaris Winters."

The two were too stunned to speak, now fully aware of who she was...