The Shrieking Shack. A supposedly haunted house on the edge of the school grounds of Hogwarts that, despite the name, wasn't actually a shack but a sealed off two story building. It's original purpose has been lost to the passage of time. But now, at the start of a new year, it's gotten itself a new purpose as the place where three certain individuals would be living throughout the year.
These individuals were the Demi-Dragon Goddesses, Blake Ouroboros and Rouge Rubedo, and Blake's daughter, Karna Lovegood, the Reincarnation of the hero of charity from whom she got her name. All of whom entered the sealed off building via a teleportation circle. The first reaction upon arriving amongst the three came from Karna, who got dust in her nose and as a result ended up sneezing, causing Rouge to let out a cackle at the Reincarnation's expense, which earned the Child of Great Red a mild glare from Blake.
"THIS is the place we'll be living? What a mess." Stated Rouge in a manner that made it quite clear that she was complaining about the state of the place.
"Maybe so, but with some cleaning, magic and I believe the term is elbow grease, we can make it livable." Replied Blake, completely ignoring her fellow Demi-Dragon Goddess's complaint. Like always, her tone was very similar to a deadpan if one couldn't tell the difference in it.
"How about instead of talking about cleaning up the place, we, you know, get to it?" Asked Karna, who was recovering from her sneeze by rubbing a finger underneath her nose.
"Agreed." Replied both of the older girls in unison.
"Alright then. Cue montage!"
"… any idea what she's talking about Blake?"
"Not in the slightest. Whatever. Let's get started."
Over the course of a few hours, the Supernatural girls managed to turn the Shrieking Shack into a livable place, cleaning up the rooms, fixing the damage caused by the passage of time and/or just straight up replacing some things that were too damaged to simply be repaired and had to be replaced. One of the first rooms they fixed and cleaned up was the one that Karna quickly claimed as hers and fell asleep in, being out like a candle in less than a second after lying down on the bed Rouge created via the Illusion of Dreams, but not before summoning Bob and snuggling with the Lagombi as sleep claimed her. Blake tucked her daughter in before she and Rouge continued to work, casting a couple silencing charms in order to make sure she and her opposite didn't accidentally wake up the Reincarnation.
Once the two Demi-Dragon Goddesses finished fixing up a pair of rooms they claimed as their own and decided it was time to hit the hay, Blake suddenly got a rather nasty feeling. The kind of feeling that told her that something very irritating was going to happen and that the best solution was erasing the source from existence.