SoulerFlare
The story officially begins when Toriel dies in her universe mysteriously. Gaster with his allies show up and take her soul remains back to his lab to save her life. Toriel then had DETERMINATION injected into her. Most of the DETERMINATION was collected from humans in multiple different universes. Gaster created the perfect solution to end RESETs and genocide routes that plague The Multiverse. A new kind of boss monster with the ability to utilize the power of the savestar. Toriel, who got reborn as Gaster's daughter in his lab due to a serious situation that happened, it was the only way to save her life.
Gaster embarks on his quest to bring peace to The Multiverse. However The Savestar becomes corrupt, doing more than its intended function.
If the RESET function is over-worked, it will erase a universe. The more universes that are gone, the more The Multiverse dies. They explore every universe they're able to, attempting to fix the savestar and rid the ability to RESET, helping others and themselves.
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Note: This AU has themes such as Suicide, frequent swearing, mentions of needles and more medical equipment. Be careful upon reading incase you are sensitive to these topics!
Also moments in the story of characters smoking and mentions of Alcohol.
Note: All 7 of the finished Chapters are published.
Chapter 8 will start in 2026.
The AU is still in progress.
Enjoy.
UnderVanquish has two creators: SoulerClash and C!rquette.
Co-Writers: Capt.Gunscar, Eversius, JK, Darkswaver, Hollow and Marble.
UnderVanquish-Comic Creators: SoulerClash,Hollow and Marble.
UnderVanquish-Game Creator: SoulerClash.
Update: March 2026/Comic is not going to happen for a while but there is an UnderVanquish game in progress and it will be massive, same amount of chapters as the fanfic and each chapter will be a game. Chapter 0 which is prologue is getting new lore. Chapter 8 is going to be delayed. I will enter new content sometime this year once I have enough content done.