Harry's pov
You would think stalking the golden group as they embark of their mission would be hard, that they would use an invisibility charm or a notice me not charm (as Harry stole the invisibility cloak) and that Hermione at least, would cast a reviling charm to check for stalkers.
Yet they did none of that, they went to the third floor, and went past the traps like in the books, with the only difference is that Neville was the one who recognized the Devil's Snare, and he stayed with Ron when he became injured due to the chess game.
Even the part in the books where Hermione told Harry how brave and noble he was, was repeated with Marcus, and if it sound suspicious... it shouldn't be, as when Harry was following them with his invisibility cloak (it's his now!), the twins 'flying method (Ascendio, wingardium leviosa on clothes, Arresto Momentum and Depulso), invisibility charm underneath the cloak and the Silencio charm to make sure they didn't hear him scream.
he used one of the times the twins owed him the map for tonight and when he looked where he is at, he found out Dumbledore was also following them.
And Harry was sure that the weird parts in the traps which mad them easy were added by him because if not, why would Fred and George would have trouble going past the traps as they told him?
And yes, of course they went there, it is Fred and George.
Anyhow.... after the 'touching moment' Hermione and Marcus had, and Hermione and Dumbledore left (she to search for him and him to appear as the all knowing headmaster), Marcus drank the unknown potion that Hermione told him was anti-flame potion (seriously, he was thinking it was Snape and willingly drank a potion he provided?), and went past the flames.
As there wasn't any potion left and even if there was, Harry was unwilling to drink it, Harry used the bubble-head charm on the fire to make it small enough, and sailed above it.
When he came inside the first villain monologue was finished and Marcus was getting the stone from the mirror. Then the second monologue began where Voldemort showed his face and started talking about how Marcus should join him and that he didn't need to die like Peter Pettigrew 'Peter Pettigrew is dead?' Harry thought 'Then is Scabbers a real rat?' A quick look in the map showed him that Scabbers was Peter. 'So it means Sirius might be innocent and in jail even though the Potters are alive. Something to check later.'
As he thought about it, Quirrell was jumping onto Marcus in an attempt to get the stone and started to burn. while they were fighting and after Harry swore he would make it so he understand how Marcus touch burned Quirrell, Harry quickly used accio to summon the stone and used transfiguration to change a regular red stone he had to look exactly like the philosophers stone, he than used depulso to put the transfigured stone near Marcus.
As he got almost everything he wanted from this place, Harry hid behind the mirror and looked as the fight ended with Quirrell's death and Marcus losing conscious.
A few minutes passed when the black flames were putout an Dumbledore marched in, put the fake stone in his pocket and then used some spells to take Marcus out of the room.
Harry, seeing he was alone and checking with the map to make sure quickly took out his wand and used the geminio curse to replicate the mirror.
He then shrank the real mirror put it in his pocket.
'As I don't know if tracking charms were put on it.' Harry thought while getting out of the third-floor corridor
'I guess it would be perfect next to my vanishing cabinet in the ROR Hiding room with the Stone in side of it with only me being able to take it out.' While thinking it, Harry's smile grew to an almost maniacal size.
'After all, this is a school and he is a Professor, I'm supposed to learn from him.'
Three day's latter
Dumbledore's pov
Dumbledore's plan went perfectly, his chosen one's friends showed him self sacrifice, honor and made him believe in himself.
Marcus drank the flaming curse potion that made him protected from flames and made any cursed person that touched him for the next hour to burn and die with the expanse of two years worth of life force.
And the all year casting of confundus made Quirrell forget using spells when trying to kill Marcus so he touched him and died.
And he made sure Marcus believed his powers came from love.
He even managed to convince his mentor he destroyed the stone even if he had to use confundus with the elder wand to do it.
So how is it possible that now when he looked at the stone he saw it was a fake??? Who took it? It couldn't be Voldemort as he wouldn't leave a transfigured stone, and he arrived 4 minutes tops after the battle was over! Who can it be?
Harry's pov
He got his grades today:
(AN: O - 90-100, EE - 70-89, A - 56-69, P - 50-56, D - 25-49, T- 0-25)
History of magic: theoretical:O
Astronomy: practical: O theoretical:O
Potions: practical: O theoretical:O
Herbology: practical: O theoretical:O
DADA:practical: EE theoretical:O
Charms: practical: EE theoretical:O
Transfigurations: practical: EE theoretical:O
Flying: practical: A
All of them was as he wanted, an excellent theoretical student with an average practical results in wands subjects
This decision was planed so he wouldn't be seen as a threat to Dumbledore while giving him the chance to get the most broken artifact in this world- the time turner.
Daphne's pov
As they were sitting in the end of the year feast after the Headmaster made sure everyone in Slytherin hate him for his bias, as even though they didn't care about the house cup they cared about the blant way he favored Gryffindor as 60 points for bravery? She didn't see him give 60 points for loyalty to a Hufflepuff or even 10 points for ambition to a Slytherin. Daphne was thinking about this year and the next.
While everyone on the research group was satisfied with this year, she wasn't, as while she got O in all the practicals and theoretical, EE in theoretical transfigurations and A in history, they didn't make one step forward in the way to save her sister. Hell, they didn't even have direction, and she was truly scared she would fail. Which was why she decided that next year she would ask for more people to join their group and she would start with Harry Peverell, as professor Snape told her some weird things about him
Flashback
Snape's last office hour of the year
Daphne's pov
"Professor, may I come in?"
"Miss Greengrass, I didn't expect you to be the Slytherin to come see me today," he said while gesturing to sit on the chair. "What can I help you today?"
Daphne sat in the chair before saying: "as you probably already know, I created a study group with the idea to research magic, and as you probably guessed, the magic researching doesn't go so well, I was wandering if you have an advice about the way to go."
"While a great ambition, you should abandon it for now. As researching magic can't be done without at least a fifth year's magical knowledge which is why only in sixth year we start giving research projects. You should instead focus on your studies and try getting more knowledge, just like mr. Peverell who while having average talent with wand subjects, can already pass the theoretical part of potions in the OWLs. In fact he remind me of my self when I was a first year...."
End flashback
She has to get the potions Genius to join her group!
Severus Snape's pov
Looking inside a persons mind when they remembered something about him was always a creepy experience, as looking into someone's mind wasn't like seeing a movie or a memory in a pensieve, an emotionless recounting of something, but seeing how someone's mind changed their look in the world and of people. In fact the only thing worse than seeing how a person saw you is seeing how a person saw someone he was in love with.
Yet, even though he really hated looking at those kind of memories he enjoyed looking into miss Greengrass's mind this time as it let him see his scheme was working, miss Greengrass would make mr. Peverell join her group to help save her sister.
Mr. Peverell would gain friends which would let him not fall to the same pits Severus fell because he didn't have any.
And most importantly, this would push not only their year group but at least the next 6 years of Slytherin to succeed in school more which will destroy the image Dumbledore and Voldemort are trying to make Slytherin look like: 'the evil, lazy and stupid group who would betray anyone for power.'
Yes, this is Severus's chance to destroy the stupid chess game before it even began.