Just after Pinkie's party for the Dark Brotherhood members ended, an important issue came to mind that Astrid brought up, "Where shall we live in this world?  We don't have our Sanctuary back in Skyrim."

Thankfully, Festus Krex had prepared for this scenario, and he explained to Astrid how he would deal with it.  "During my time in our Family, I found some documents on how the Sanctuaries were created.  The one creating the sanctuary would cast a spell, and would ask the question that the Black Door would ask for those who wished to enter the Sanctuary.  The person casting the spell would then answer the question and the Black Door would appear out of thin air and appear where the caster was pointing.  The inside of the Sanctuary would generate itself and have our supplies inside it."

Astrid was relieved that Festus had prepared for this, and she replied with, "I am certainly glad that you know how to establish a Sanctuary in this world.  But where shall it be?"

Festus had a location in mind, "I shall create the Sanctuary beneath the road near the Everfree Forest.  As for the question that the Black Door will ask, shall we use the same question for our Sanctuary back in Skyrim, or should we use a different question?"

Cicero had a question in mind for the Black Door to ask, and he decided to tell the other members of it, "A while back on my way to Skyrim with the Night Mother, I found the phrase for the abandoned Dawnstar Sanctuary.  The Black Door would ask, 'What is life's greatest illusion?' and the correct passphrase was, 'Innocence my Brother.'"  

Festus debated on which phrase to use, and chose the one that Cicero mentioned from the Dawnstar Sanctuary.  "Very well then.  We'll use the phrase that Cicero brought up from the Dawnstar Sanctuary.  I'll head to the spot and cast the spell."

Festus Krex headed beneath the road by the Everfree Forest, and found the perfect spot to place the Black Door.  Festus prepared the spell with both his front hooves and unicorn horn, and as it charged Festus asked, "What is life's greatest illusion?"  Once the spell was fully charged, Festus spoke the words, "Innocence my Brother," and he released the spell into the spot he was pointing at.  All of a sudden, a Black Door with a skull on it appeared where the spell struck, generating from black mist.  

Meanwhile, back in Ponyville, Astrid and the other members of the Dark Brotherhood debated on how they would get themselves publically known throughout the realm of Equestria.  Gabriella was the one to resolve the issue when she proposed the following scenario, "I just so happened to have a copy of 'A Kiss, Sweet Mother' on me when we went through the portal to this realm.  I propose that we take it to a writer to have it copied and shipped to libraries across this land of Equestria.  Of course, we would have to publish other works of our Brotherhood, and that might take a while."  

Astrid grinned upon hearing this, and said to Gabriella, "Gabriella, I think you may have just provided us a means of making our presence known in this world."

Afterwards, Gabriella headed to Twilight Sparkle's library, and sought out Twilight Sparkle.  Once Twilight came downstairs, she said, "Hello Gabriella.  Did you enjoy the party?"

Gabriella replied with, "The party was enjoyable.  I am slightly disappointed that your kind does not eat meat or even have meat for others, but I suppose it's natural since ponies don't have the right teeth to eat meat."

Twilight replied with, "Oh that's not true.  We do have some places in Equestria where you can get meat, but it's mostly for the foreigners who come to visit our land."

"Intriguing," said Gabriella, "I suppose it would make sense to have some variety of cuisine for foreign visitors. By the way, I happen to have a book with me from a friend of mine back at home, I was hoping that you would be able to copy it and sell it to other libraries in Equestria.  Would you be willing to?"

Twilight was joyed that she would be able to help a book become popular across Equestria, but first she asked, "May I see this book that you wish to be copied?"

"Of course Twilight.  Here it is."  Gabriella's horn glowed dark blue, and she levitated the book to Twilight Sparkle.  

Twilight looked at the book.  "Hmm...  'A Kiss, Sweet Mother'?  Funny...  I don't remember ever seeing this book in the library before.  But then again, Gabriella did say that it's from a friend of hers back in her homeland." thought Twilight.

Twilight then asked Gabriella if she could take a gander at the book's contents, and Gabriella replied with, "Yes, you may read the book, but not until after you make at least a few copies for this library."

Twilight complied, and she used a copying spell to make multiple duplicates of the book, and afterwards she levitated them to the proper spots on the bookshelves of her library..

Satisfied with how fast Twilight was able to copy the book, Gabriella allowed Twilight to read the copy that she had with her.

A Kiss, Sweet Mother

Authur, unknown

So you wish to summon the Dark Brotherhood? You wish to see someone dead? Pray, child. Pray, and let the Night Mother hear your plea.

You must perform that most profane of rituals - the Black Sacrament.

Create an effigy of the intended victim, assembled from actual body parts, including a heart, skull, bones, and flesh. Encircle that effigy with candles.

The ritual itself must then commence. Proceed to stab the effigy repeatedly with a dagger rubbed with the petals of a Nightshade plant while whispering this plea:

"Sweet Mother, sweet Mother, send your child unto me, for the sins of the unworthy must be baptized in blood and fear."

Then wait, child, for the Dread Father Sithis rewards the patient. You will be visited by a representative of the Dark Brotherhood. So begins a contract bound in blood.

After reading the contents of, "A Kiss, Sweet Mother," Twilight Sparkle was disturbed by the text of the book.  She had not known of this group of assassins known as the Dark Brotherhood, and she was horrified to find a ritual to summon one of their number by stabbing a corpse replica of the person wanted dead made with actual body parts.  Twilight Sparkle had a visible look of horror on her face, as well as disgust.

Gabriella then said, "Are you alright Twilight Sparkle?  You're turning green."

Twilight merely replied with, "Excuse me please Gabriella," and then went off to the bathroom to vomit in privacy.