The idea was originally found in A_Bored_Reader Undertale ideas for stories that hit me like the brick called Reborn! I asked permission to use it. Read the original if you're interested, but it contains quite a few spoilers for this story.
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Warnings: Suicide attempt and judgmental. Mention of poisoning, wounds, impatience, restlessness and tension.]
Nightmare and his gang showed their care in a rather special way. For example, Nightmare poisoned him multiple times with the intent to make him immune. He smiled to himself at the memory.
Error used his magic and glitches to prevent Dream or Nightmare from being able to read his emotions with their magic. But Nightmare didn't only rely on his ability to read emotions or the surface, he carefully observed his targets and his companions as well. When he first caught sight him during his self-destruction, Error laugh while tugged at the strings, which he wrapped around his own neck, shattering his bones into shards, which gave way to blood with loud cracks and turned to dust before painfully glitching back into their shattered state. Pain didn't mean anything at this point, his strings cut into his fingers as he forcefully try to destroy his body. He immediately noticed Nightmare's arrival and turned towards him with a wide grin, even his neck cracking at the sudden movement. Nightmare's surprise was visible for a moment before he teleported to his side with a dark grin.
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– Have you tried poison? – watching with interest the wounds he left on himself.
– I didn't, but others tried – Error's voice distorted darkly from the glitches as he studied Night's expression and gestures.
– Aren't you not interested in the taste? – Nightmare tilted his head to the side and smiled demonically. – It can have many layers, both bitter and sweet, depending on how, with what and to what extent it is mixed – inviting him to an experiment.
– Are you ready for the destruction you unleash? – Error leaning menacingly close.
– We can also mix it in tea – Nightmare in amused tone. – I already know the right place and victims on whom we could experiment – giving room to his sadistic side opened the portal. Error removing the strings, follows him with his own portal with cold interest. The naturalness with which Nightmare handled his self-destruction at that time meant more with every moment it passed, as he was glad that he didn't see him any less, didn't got traumatized, got mad or tried to force anything on him, but in the meantime he still managed to stop him.
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