Rise of the Holiday Guardians

Rampent Nightmares have been turning up into the Orphyne Sector of the AUU and has become enough of a concern to get the Grand Council involved, to asked a dream exbert and student of the Magilo Elder, Elder Morpsmus, to come help. At first it was assumed to be another nightmary parasite, but when the Exbert pointed it shorce to an isolated part of the secter, the exbert only ended up opening a can of worms and was arrested at the spot by UIS for it, accusing the exbert of trying to expose more isolated systems. Fortunately, thanks to intervening heroes, UIS was pasifived for now and the exbert, Dream Waver, further explained that the Nightmares were the work of a force that felt like a byproduct of Grim Magic, to the bemoanment of Madam President that Grims are once again the reason why more isolated Systems are compromised! Fortunately, Grandmind proved more willing to allow the misfits to do what they need to do to resolve it, (Granted under almost the same terms from the Remena situation, but the Grand Council were allowed to iron out the details this time), and gave the Heroes unfethered actcess to the isolated systems of the secter. Thus, with the Remena Teams tagging along for additional help, espeically with Team Grimer and Team RPJB, they would discover that the primary shorce, a season themed set of systems, was actselly the original homerealm of the Seasonal Mages. The Heroes were then intersected by drone enforcers of the neightering alien race who are simular to Nefarious' nerdy tech support aliens, The Sukians. They were taken to a lead exbert of the systems, Dr. Irelly S. Uck, who explains the full story, that once apawn a time, a member of the systems isolaters, the Karnavores, A race of Oviraptor-Beaked Dino-Giraffes, named Dimmer Light, was the Grimsister that tecnecally was the first creator of what Remena knows as Grimaces, where a horrorable accsident left her to become one by accsident when he was exspearimenting a way to create a grey-area between life and death, becoming a Pitch Black like entinty, also becoming what are called a Crazo Grim, Grims not set to the rules of only acting out when provoked or based on any Grim rules. She created a Legion of Dark Zorses based on Pitch's Nightmares to spread nightmares to the universes, starting with the initional secter, then spreading once she becomes powerful enough. The Heroes realised that Dimmer needs to be quelled as a threat, and the Lougers brought up the best idea for this: The possability of the systems having their own Guardians of Childhood. However, Tephra of Team Grimer can't help but feel sympathic for Dimmer light, being condemned as a Grimace and wonders if she can be helped, being at risk of ending up being like Hiccup when he thought Drago could've been reasoned with. Can our heroes be able to find these AUU Guardians AND keep Tephra from making the same mistake Hiccup once did?