Jack Noir is back for revenge in eight years and that his prime target is Terezi and Sollux's helpless twins.
8 years later Terezi and Sollux learn of their future via text message and the night before the battle with Jack decide to do it one last time before Sollux is injured. The next day Terezi and the kids hide while the battle is going on. Terezi tries to throw Jack off their scent but fails.
Jack: hello Pyrope going somewhere
Terezi: CRAP TERUKO TAKE TENBIN AND TOSHIRO AND RUN
An alternate Jack grabs Teruko and the twins.
Terezi: LET THEM GO JACK THEY HAVE NOTHING TO DO WITH THIS FIGHT
Jack: so you care about them more
Jack pins Terezi down.
Terezi: SOLLUX HELP US PLEASE!
Jack fires towards the twins and Sollux gets in front of them taking the hit.
Jack: he truly was a hero no then where was I
Sollux starts glowing brightly and Terezi takes this opportunity to kick Jack off and run to the kids.
Sollux: DON'T YOU DARE FUCKING TOUCH THEM JACK OR I WILL MAKE YOU SUFFER!
Sollux is now MAGE OF DOOM II
Jack: well looks like we need to show Captor who's boss
Sollux and Jack fight but Sollux struggles against them. Terezi calls out for back up and takes the kids to a secure location. Everyone but her is in godtier 2 mode and knowing full well what her futureself told her |flash back FgC: YOUR3 GO1NG TO B3 PR3GN4NT WH3N TH3 B4TTL3 H4PP3NS B3C4US3 YOU 4ND SOLLUX DO 1T TH3 N1GHT B3FOR3| she takes a risk and transforms to protect her precious kids. Everyone but Terezi is fighting off an alternate form of Jack Noir trying to end this dumb attempt at revenge on them. Jack holds a gun to Terezi's head and threatens her. Terezi cries and begs to be let go as she thinks about the kids and her future baby that is growing inside her. Jack pulls the trigger but Sollux hit him just in time to make him miss. Terezi runs knowing that it's too dangerous for her as Sollux and Jack fight. Terezi finally transforms and joins the fight.
Jack: noooooooooooooooooooooo
Sollux: you'll be dead before you know it jack
Terezi clobbers Jack in the face with a dictionary.
Sollux: thanks baby
Terezi: no problem
Jack: you've not won yet
Terezi: GUYS WE NEED TO DO THIS AS A TEAM
All: YEAH
They join forces and "digivolve" using laser eyes, claw cut, dragon sword, chain saw, aqua blow, turbo run, dead beam, fist of furry, sea shot, eight ball poison, cat scratch, and club attack on all the Jacks to finish them off. Terezi thinking about the kids and her future baby puts the most power into her attack. All the Jacks are defeated except for one.
Jack: you cannot kill me
Sollux: watch us
Then a white dude that looks like Jack stops the battle.
Terezi: w-who are you
PM: I'm Peregrine Mendicant and Jack Noir is mine
Terezi: okay have fun
Jack: oh fuck no
Pery: you guys can call me Pery
Sollux: okay
Terezi: okay...KICK HIS ASS PERY
Pery grabs Jack by the shirt. Terezi pulls out popcorn. Pery only punches him once in the face.
Jack: why are you after me
Pery: because i motherfuckin love you
Pery kisses him and everyone stares at them dumbfounded.
Terezi: uhhhhhhh is anyone else confused
Sollux: yeah are you gay or something
Karkat: YEAH
Pery: no I'm a girl
Gamzee: NiCe bRo
Terezi: that explains a lot
Pery and Jack start doing it and everyone goes home. Terezi and Sollux tell Teruko that they're having another baby.