The Dark Truth of the Old Mewman Dimension

Ever since Star's surprise aide in The Weirdest Villain from Space, Star had been LARGELY curious to what Millipede meant by being "surprised" that Mewmanity's still a thing. Thus Star and Marco deside to go talk to Lord Millipede in his containment in the Magic Commission's speicalised dunguin. However, Millipede dropped the ultamate bombshell on what he meant by that and what happened to Mewmanity's old dimention: It was destroyed by a galaxy sized race known as The Xexaxez, the devourors of dimentions that eat and turn dimentions into their cosmic qouantim engery often as a consiquence for a dimention either being too powerful or are considered a mistake. And the old Mewman Dimention's mistake was that it got too powerful and became a threat to all other diimentions when it was under the rule of the very first Mewman King, who cause he managed to start harnassing all of the magic of the magic realm he became so powerful that he became a mortal that became a self-made outter god. Cause of, the first king over-poweredly congured the entire old dimention in the first day and created the Butterfly Monarchy. This, was when the Xexaxez invaded and devoured all of the Old Dimention, forcing Mewmans to run from the dimentional eaters as a result. Millipede explains that the reason the Xexaxez didn't follow mewmanity into Mewni because the current dimention is "Not the one being punished", and that the Xexaxez are only ever allowed to appear in dimentions "set to exicution". This means, Mewmanity were of a dimention devoured by lovecraftian cosmic entities beyond comprehendsion or understanding, and that the dimention was devoured for the same reason as what got them in bad tidings to monsters to begin with: their imperialistic nonsense. Millipede also dropped another bomb shell: Toffee and Coffee were malmitulated by the Xexaxez to try and chase Mewmanity out of the dimention so they would be left to be consumed by the Xexaxez and converted into cosmic qouantom engery. When the Magic Commission defeatedly admited what Millipede said is true, Star was BEYOND desistated, and Marco was freaked out beyond belief. Equilly surprised from this, both the Lougers and the HA came to comfert Star, along with all she came to befriend... However, this became short-lived when Toffee is reveiled to be alive, though now amiting a forboding quantom-cosmic engery and is beyond powerful, too much for even Gazelle and Magnum combined. The Cosmicly powerful Toffee grabs Star and escapes into a dark cosmic portal that escapes into "Dimention Nothing", a realm between all known dimentions and the Xexaxez' home realm. Now Marco, both hero groups, and the commission in wishing reptentence, aim to enter Dimention Nothing and save Star, all the while contend with the teaming up Coffee and Taffee who had learned the truth behind Mewmanity's reasons in the dimention and aimed to save Toffee from being a vessel of creatures out to punish Mewmanity for their old king's actions. The group need to find a way to coherse the amoral, and mute, Xexaxez beings to spare Mewmanity with the promise of never making the same mistakes again, all the while contending with Toffee being turned into their mindless avatar.