Out of his gratitude for Exetior saving him earlier, Negagen decided to try and save him. Later, Negagen found Exetior being surrounded by a bunch of demons. He intervened and knocked out the both of them, and gave advice to him on how to handle the souls better before leaving. One day, while wandering in a water forest of Mobius, he saw Negagen, who had absorbed too many souls, about to be attacked by Dia-Li-Lax and his friend. Thanks to his power, making him by far the strongest demon, he could do whatever he wanted, whenever he wanted, like taking the form of Sonic.

However, wanting Mobius for himself and for it to not be erased, decided to go against the Highests and go around gathering information on demons while disgusing himself as a Demon of Sharpness. The other Highests didn't want to listen Exetior, as they thought he was just a pawn, like the many other worlds created by them. Unlike all the other Highests, which were cold to the worlds they created, he was greatly attached to Mobius and did not want it to be erased. At first, his original name was Executor, then people simply called him Exetior as a nickname and kept it. 1.10 Nightmare Shorts: Wonders of NaivetyĮxetior used to be an Elite Highest and was one of the creators of Mobius.1.7 Sally.exe Continued Nightmare: Eye of Three.1.5 Sonic.exe: Nightmare Beginning Remake.He succeeds in killing them, and then goes after the second Trinity ( Amy, Cream, and Sally), and possibly the rest of Mobius too. Eggman) to get full control over Sonic's body. Due to Sonic having a strong will, Exetior then goes to hunt the first Trinity ( Tails, Knuckles, and Dr. He is an arch-demon who escaped from prison due to constant outbursts of the Master Emerald and has taken refuge inside the body of Sonic the Hedgehog. Exe likely stands for Exetior and potentially Executor. ― to Exeller when he gave tips to him in Sonic.EXE: Spirits of HellĮxetior (エクセティア Ekusetia) (originally known as Executor and also sometimes referred to as X as a demonic nickname) is the titular main antagonist in Sonic & Exe and the Sonic.exe Nightmare Version series. Tails is weak, but after some time he could defeat you.' ' Remember, be careful with the timelines.

Sonic exe spirits of hell