It had taken the girls a couple of days to procure all of the ingredients listed in the book and a few more to successfully brew it. They already had most of their supplies as each girl carried a bag with an Undetectable Extension Charm and Featherweight Charm on it containing all of their gear, money, books in Hermione's case, ready-brewed potions in Luna's case, and of course their clothes and photos.
Luna had taken care of the brewing naturally while Hermione, who had a more extensive knowledge of ancient runes, read from the book aloud. Hermione and Pansy were both excellent potion brewers, but Luna had a natural talent for it that Hermione could only liken to the abilities of their old Potions Master Severus Snape.
She had managed this potion remarkably fast despite its complexity and they were just about ready to make the leap.
"I do hope we'll have long hair when we wake up," Luna suddenly commented dreamily. It was a random statement to make at a time like this but Hermione and Pansy both knew that Luna missed her long hair because of the connection it had formed with her mother, who had apparently always loved her daughter's long hair. The girls had all cut their hair into pixie cuts during the height of the war to make their identities less obvious and for convenience's sake. The time-travelling potion was theorized in the book as having a rebirthing sort of effect. It stated that the user would be eradicating her entire existence in whatever timeline she was attempting to leave and would awake in another part of the timeline with a body reflecting one's inner image or what some referred to as one's soul. This worried Hermione in other ways than hair length, however. Hermione was too focused on the word "soul" when reading the text and worried endlessly that she might be reborn looking like the murderer she had come to be since the war had truly started. She feared her soul was not as clean as it had been in her youth and she dreaded the thought of seeing a visual representation of that shift.
"Luna, let's not worry about cosmetics while we're still trying to just make the potion work in the first place," Hermione heard Pansy tell Luna gently. Hermione somehow felt like the statement was directed at her as well and put aside her dark thoughts for now.
"Alright girls, wand hands out please," Luna suddenly announced. Pansy and Hermione quickly complied before Luna abruptly cut each of their palms with a quick slash of her wand. She did the same to her own wand hand before telling them to quickly wrap the bleeding hand around their wands. All three girls soaked their wands in their own blood before dropping them unceremoniously into the cauldron.
"Alright now say the words together," Luna intoned.
"Noster sanguis natus iterum in tempus linea," they chanted strongly together and upon finishing the last syllable felt the distinct sensation of the world turning black.