POV Iris.
It's been four days since everyone came back from Yule. And it was time to ask Professor Snape to help. Since I have Potions class today and then a free period I'm going to ask after class. But first Transfiguration.
Time Skip After Potions.
When everyone walks outside I go to the Professor. Iris "Professor would you do something for me?" he looks at me with an expectant look. Iris "Could you make a potion for me?" Snape "and what potion would that be? And why do you need it?" Iris "It's not for me but for Alice and Frank Longbottom Neville's parents." I took the book I showed Madam Longbottom out of my bag and handed it to the professor. He took it and saw the bookmark I had put in it. The professor opened it. Snape "Although I would like to make this potion some of these ingredients are hard to come by". Iris "That's okay I already have the ingredients but I want it to be perfect that's why I'm asking you to make it?" he looked at me "You have the ingredients. And how much did you have to pay for that. Or even for this book?" "I didn't have to pay anything the book was in my family library in Potter castle. The ingredients were also in the castles potion lab." He looked surprised at that. Snape "Very well I will make the potion but not for free." Iris "Are you willing to make it for five times the needed ingredients?" Snape "Of course." Iris "Then I will have a house elf bring everything to you tonight." The professor nodded his head. And with that, I walked out of the classroom.
It has been two weeks since school started again and it is time to find what I need for the next step today. When classes are over I go to the 7th floor. I walked 3 times in front of the wall a place to hide something. When the door appears I walk in and walked to where I knew where the diadem was. And carefully picked it up and put it in a bottomless bag. And with this Horcrux safe, I walk to the great hall for dinner.
After dinner, I go to the common room with the others. And I wait in my dorm room. With the help of the map, I wait until almost everyone is asleep. And after 3.5 hours I saw that there were only a few people walking around that I could avoid. I take the invisibility cloak from my trunk and carefully walk to the 3rd floor. With a magic spell I open the door and change a stone into a flute. Slowly I see the curberus fall asleep.