The air we musty with broken people and deteriorating determination. Nightmare walked throughout the dark dimension, chuckling quietly to himself as he carried the soul of one of the fallen Frisks. It pulsed with unending emotion, trying its best to drop out of his grasp and onto the ground, or into the void, whatever it could to get away from him. "Oh, little thing," he smiled at the glowing red heart. "You are too weak to defeat me, let alone escape me now. You're going to be very helpful in bringing back an old friend, someone who you took the life from to save your own. Quite selfish, considering who you are."

In the distance was audible grunting, alongside a strange gurgling noise, as if someone was attempting to breathe through the ocean itself. "We've tried to resurrect this individual without a human soul, such as yours, but to no avail. Once your souls are combined, his will take over, since he has more... vigar for the fight, than you did, dear little Frisk." 

With the creak of a door, the person was revealed. He was horribly mangled, presumably from some sort of epic, end of the world like battle. The error signs that floated around him flickered in and out of existence, the faint static noise produced in the room not intimidating but pathetic sounding. Error was the one producing the stomach twisting gurgling noise, as red and black bone marrow poured out his wounds and down his nose. Whoever had done this damage had spared him no mercy, and the soul that Nightmare held quaked at the sight of such brute violence. 

"Don't be scared," He stepped towards his fallen comrade. "You're going to a good cause, one that any Frisk would accept given the time to understand it." Then there were bone crackling, hair raising screams as Error fought the soul for control over his body, the Determination possessed by it already mending his wounds and making him stronger ten fold. A few minutes passed by, Nightmare watching with a sickening smirk of admiration for the internal battle that was happening, and sighed once silence at last broke. 

"Thank you."