Rise of Shroud Master

The Mane Seven, plus Sunset Shimmer, then come in to explain how they are known beyond just the AUU, but also in a familiar singular universe. The Lodgers pay another visit to the Human Equestria because Coo has some news. It appears that Principal Cinch from Friendship Games has mysteriously been able to locate Coo thanks to certain events from Legend of Everfree by stealing a Equestrian-magic-infused geode similar to the ones the Human Mane Seven possess, and by effectively displaying it's power publicly, makes good on her sworn threat of punishing Canterlot High for failing to 'preserve Crystal Prep's reputation'. With this, the government has naturally looked into this as EG Malefor declares that this magic be taken into proper consideration, captured Coo, placed Canterlot High under government supervision, and they plan to find a way to harness this magic. Coo is shocked to see how her cover has been blown so easily by a human who was more of a sore loser than she thought. She is able to escape with help from the Human Mane Seven, and Coo calls the Lodgers for help. When they come back to Human Equestria, they discover that there is something off with Principal Cinch, as this was not out of revenge as she really WASN'T a sore loser from the beginning. The heroes begin an investigation to find out what's controlling Cinch, as it might involve yet another creature being kicked out of Equestria. This creature is none other than the Shroud Master, a poltergeist that used to be a powerful overlord born from a wronged soul who wreaked terror on those who wronged him and took over the land, even defeating Celestia and Luna, until a priest ended up exiling the creature to another dimension where it would do no harm. Now, the Shroud Master has been waiting over a thousand years to find a way to return to Equestria and exact his revenge, possessing Principal Cinch and using the humans' natural ways against them. He even ends up destroying the portal back to the UUniverses on his way out, seemingly trapping the lougers in his once prison, figuring everything except one detail: the portal is actselly only one of two ways to get in and out, and he never figured that the other way is through Gaia Everfree. So they must hurry back to Camp Everfree, all with a guilty and willing-to-help Cinch who admits that she had forsaken her wish to see the school pay, and also wants to even make it up to Sci-Twi for what she did to her, and even help her with conquering her fear of Midnight Sparkle since not only did she accept full blame for traumatizing her to that point, but Shroud Master learned this weakness in her by reading Cinch's mind, and succeeded in getting back to Equestria using this fear by using a mental attack based around Midnight that scared her to stop fighting, but also explains the history of why she was a reputation-valuing principal from the beginning. So the heroes must find Gaia Everfree, and use the geode reservoir, which serves as a teleporter to the UUniverses, and stop Shroud Master once and for all.