After failing to escape the classroom and reluctantly agreeing to meet Fleur's parents Reima heads up to the Room of Requirement. He's alone as he wishes to enter a dangerous area that could be full of cursed and dangerous items. If Ciri entered with Snuffles he'd have to keep an eye on them 24/7, not allowing him to do what he's come here for...
Opening the door to the Room of Requirement he immediately can tell that he's in the right place, towers of books stacked as high as they can go as far as the eye can see. A massive room that doesn't seem to end is completely littered in stuff that the House Elves had left here. Broken furniture, rusty weapons and even prank items that the Elves couldn't find a use for is left in this room. Reima had only expected to be in and out of here after finding Rowena's Diadem however after seeing all this loot, he decided otherwise.
Walking up to a book tower he picks up an old dusty one and reads the title : "Ye 'old Beginner to Master's rituals"
...
Is it really an old book or did they just name it that to make it sound more legit? Either it didn't seem recent as Reima hadn't found a single mention of ritual magic during his long walks through the magical book stores, nor did he find any in the Hogwarts library.
He opens it in the middle and reads page 200, "For the young lady who wishes for perfect skin that resembles a babe, boil a human child under a year old until moist and succulent-" he closes the book with a clap, deciding that if this was the middle of the book, he'd not like the end of it... However... He opens the last page and reads it, "For those with the bravery, cunning and determination to become great. A ritual to increase magical power." Reima can't help but to be interested, increasing magical power was rather difficult and usually you were stuck with what you naturally possessed. This was partly the reason Pure-Blood's made such a big stink about Muggleborns, however you could slowly increase your power through constant practise and use, though this would take years of constant work. Reima continues to read the ritual in the book, "Ingredients for this ritual include : the blood of a young unicorn that's still shedding it's gold fur, part of the liver of a dragon older than fifty years of age, the fresh gland of a Nundu, a large amount of human blood (Preferably virgin) along with silver and gold. Last but not least you will need five sacrifices that haven't known the pleasures of the flesh (Age is not a concern)."
Reima isn't sure how to react to this, all these ingredients are listed as if inside a cook book. However the thing that disgusts him the most is the small text at the end of it, "The Ritual will increase a Wizard or Witches magical power by at most 1%, quality of ingredients contribute highly to the outcome"
Essentially you get almost no boost from this ritual that a requires human sacrifices and unicorn blood. Reima erases this page from the book as he sees it as impractical and worthless. You'd get a more efficient way to increase your power but just using a gun, or creating a more powerful wand. Why use such a crappy ritual?
Shaking his head he seals it away in his Folded Space and heads towards the malevolent aura perverting the room. It was what he came for an would have time to sift through all the valuable of the room once he completed his mission.
He continued to walk through the room until he spots a small box resting on a discarded rotten table. He flips the lid open and is mesmerised by the blue jewel encrusted Diadem... He feels as if he can hear whispers from it, however he isn't scared. Instead, a smirk finds it's way on his face. "Let's see if this works, shall we?"
Reima's hand is slowly covered by a black and red mist that seems to move and squirm as if something is trying to escape it. He moves his hand over the Diadem and the sounds escaping from it only increase, like it can feel it's impending doom. He grabs the Diadem with the Dark Hand active and immediately feels resistance, it shakes and shudders in a similar manner as his own necklace is currently doing. Black mist tries to escape from the Diadem in the form of a face, a face that resembles Voldemort's nose-less visage. Reima uses the Dark Hand technique with his other hand and punches the apparition in the face, he's not surprised when it starts being absorbed into his hand and gathered above his heart where the Dark Sign was originally placed.
Eventually, when he feels like he's got a grasp on all of it, he pulls his hands away, as if dragging Voldemort's soul from it's hiding place. A shrill scream let's him know he's successful as he feels the familiar sensation of adding another soul to his vast collection... Only, it feels as if this soul isn't even complete... Which makes sense as it's only a shard.
The turquoise mark on his chest pulses in what seems like satisfaction, Reima looks down at the now cleansed Diadem and wonders if the rumours of it granting genius intellect were true... He puts it on and... Feels nothing.
Reima "Must mean I'm already a genius." he snarks to himself. He can't really feel if the Diadem has any affect on him and decides to lend it to Ciri or Fleur when he sees than to find out if they feel anything.