I do not own Harry Potter.
The group of teenagers land in an empty field looking around when a flash of white brought another being into existence in the form of Gabrielle Delacour. Which had shocked the group that she would be here as well, then the Three Sisters appeared in front of them causing them to bow.
"Arise children no need to bow we have come to train you for the next few weeks in your family magic and guide you to the correct gate and placement in the family." Said Elaine show she was the motherly of the trio. But Neville stammered "We are not worthy to be in your presence you're the Sacred Trinity of Witches in the Wizarding World ranked in importance in comparison to Merlin" causing Elaine to scowl but Morgause defused the situation by saying "The hack Merlin is a liar and a rapist he raped Elaine to gain an heir as in the Whole Dumbledore he stole and fucking took credit for our work" Morgan shook her head at her sisters causing her black locks to swing. "Children we are to complete your marriages and by the time you leave you will be six months pregnant with your heirs so can we move along now" the children nodded stunned they will be married and having children. Elaine pulled out her ivory wand and said "Morgan will announce the couple that will be married by their full title, I will wed them and Morgause will send them to their chambers in the palace understand" all they could do was nodded which made the witches laugh. They nodded as Morgan changed their robes the girls into fabulous wedding gowns with their house crest except for Cassiopeia who wore a simple red gown and the boys had plain white robes with their house crest. "Oh Cassiopeia you will be married before you gate it's just hard to pull him here now with the Old Coot looking for you all."
"Now will His Grace Duke Draconis Abraxas Pendragon-La Croix and Her Grace Hannah Pendragon come forward" the two were shocked but came forward and Elaine performed the ceremony and they were wed. "Will His Royal Highness Crown Prince Draconis Abraxas Pendragon-La Croix of Frances and Her Royal Highness Crown Princess Astoria Simone Aquinas-Pendragon come forward" Everyone was stunned until Elaine wed the two and made things worst "I give you the Future King and Queen of Magical France" everyone was stunned when the two were married. But Morgause banished Draco, Hannah and Astoria to their chambers. When Morgan cleared her throat and said "The Most Honorable Marquess Neville Ignatius Pendragon-Prewett and The Most Honorable Marchioness Callidora Isla Pendragon come forward" the pair moved and was married then Neville was call as Duke Pendragon to marry Susan and just like Draco the triad was banished to their rooms.
"His Grace Duke Blaise Markus Julio-Claudian-Pendragon and Her Grace Tracey Melanie Pendragon" they were wed but the shock was when Blaise was wed to Psyche because Elaine exact words were "I Give you the Future King and Queen of Magical Italy Crown Prince Blaise Markus and Crown Princess Harmonia Psyche Julio-Claudian" Before questions were asked the triad was banished to the rooms. She cleared her throat and said "His Royal Highness Prince Aurealis Regulus Crouch-Pendragon and Her Royal Highness Princess Gabrielle Serene Moreau-La Croix come forward" the duo were married and then he married Patricia who became Duchess Crouch, the triad was banished. "Well it is only these three then and Cassiopeia so can you banish Princess Royal Cassiopeia Dorea Pendragon to her room" Morgause nodded and did just that. "Now will His Grace Duke Hadrian James Pendragon and Her Grace Duchess Daphne Rose Aquinas-Pendragon come forward" they were wed and Daphne was waiting for him to marry Enyo. "Now Crown Prince Hadrian, Crown Princess Enyo, and Duchess Daphne you will go to your rooms and get adjusted to each other.
So over the next few weeks the children trained and honed their magic and learned that they were to bring back the Three Strong Royal Houses of Pendragon, La Croix and Julio-Claudian which all the countries knew were returning and all the royal lodging was make themselves habitable for them for the Gating will be the end of the Founders Security method and the Merlin Usurp. As the time winded down the children saw Cassiopeia become married to the Marquess Severus Tobias Snape-Prince. All the wives were confirmed as pregnant with twins a boy and girl and to put further shock all magical even Gabrielle's son became a male veela as well as a Draco's two sons a rare event that was surely hidden as myth.
The Three Ancestral Witches said "It is time for you to go but when you go to Hogwarts for the Gating Hadrian wait for all to be gated and say Hadrianus I maiestatis eius Iacobus rex pendragon Camelot teque perducat te depositum cantatas insulae huius in usum mihi summus rex, yes I know it hard to say but you must and Daphne you must say that you are Daphne i am Rosa pendragron tenebris matron and to complete it Enyo you must say Enyo i pendragon celsitudini regina consorte am vesperam et futura fero haeredi princeps regalis sublimitas pen dragon. This will bring all the magical realm of Britannia under the control of Hadrian so do us proud children" with that all the children vanished into black flames the signature of the Ancient and Most Powerful House of Pendragon. The Three Sisters had faded away into their portraits knowing that The Heir of Mordred and Arthur has been found.
Meanwhile the children returned to their homes Hadrian, Draco, Blaise, Cassiopeia, Callidora, Enyo, Harmonia and Neville landed at Grim Manor to see Sirius fighting a member of the Order so the children split up to help fight the invaders Harry took out the Order Member fighting Sirius with a red curse that made the victim scream.
"Thanks Pup what was that spell anyway" said Sirius gasping for air after his fight as Harry shook his head and said "That was the curse of the nightmare of a thousand scream very effective illusion if I do say so myself." Sirius shook his head as he saw a bolt of red head towards Harry who batted it away. "So Siri was the Order invading the Manor?" Sirius laughed and said that they were looking for them and the Sisters to gain control of you all and to top it off Lucius is pissed the Draco and Narcissa went against him to join the family. A burst of gold light flew towards them destroying half of the wall as the smoke cleared a wizard in bright blue robes stood with his wand poised to strike again. "Go Sirius I handle this one ok" Sirius nodded and took off. "So Dumbdork why are you invading my home" Dumbledore shook his head and said "Harry I'm here to bring you back to the light and your friends the Weasleys" Harry scoffed and bellowed "irasceturque magicae" a bolt of white hit Dumbledore making his magic flare its pure white shade before starting to dull. "Oh and Dumbledore you have until the end of the school year to figure out what that spell did tootles" and a wave magic pushed him and the Order out of the Manor for good.