As the clock struck twelve, Harry heard a deep voice say “Bombarda”
The door to the hut was blasted open. Harry’s eyes widened when he sees a tall, skinny, long greasy haired, hook-nosed man with a long black cloak and a woman with a green cloak and wire rimmed glasses entered.
“Which one of you is Potter?” The man asks.
“Ummm… me, sir” Harry replies.
Suddenly, Uncle Vernon and Aunt Petunia come down the stairs. Vernon holding a shotgun
“You are trespassing sir. I’ll have to ask you to le-“
“Expelliarmus” The man shoots a red light at the shotgun, blasting the weapon out of Vernon’s hands, crashing into the wall and breaking in half. Luckily, no bullets were fired so no one was harmed. “Why don’t you and that pig of a son keep your hooves out of the cookie jar once in a while. That boy’s gonna need to be wheeled around before he becomes an adult at this rate.” He then sneers at Petunia. “Tuney” he says condescendingly.
“Severus” Petunia screeches back.
“Hello Harry. I am Professor Minerva McGonagall. Deputy Headmistress and Head of Gryffindor House at Hogwarts. We’ve been trying to send your letter to you, but we’ve gotten no response.” The woman says. “From the looks of things, I can see why” McGonagall stares at the Dursleys with a cold look in her eyes.
“Severus Snape. Potions Master and Head of Slytherin House.” The man says coldly. He then looks closely at Harry, as if he’s recognizing something. He then hands Harry a letter. “This is for you”.
As Harry reads the letter he’s confused. “What’s Hogwarts? And wizardry?” He asks.
Snape rolls his eyes. “Dumbledore trusted these fools to look after the boy?” he mutters to himself. “They didn’t bother to tell you anything? I would’ve thought you’d tell him about it.” He says to Petunia.
“He won’t be going. We swore when we took him in we’d put an END TO THIS NONSEN-“
“Let’s see you try to stop him” McGonagall says, pointing her wand at Vernon.
“You knew?” Harry asks his aunt and uncle. “YOU KNEW THIS ENTIRE TIME AND DIDN’T SAY ANYTHING?!?!” Harry demands.
“Knew? Knew? Of course we knew!” Petunia sneered. “How could you not be, my dratted sister being what she was? Oh, she got a letter just like that and disappeared off to that — that school — and came home every vacation with her pockets full of frog spawn, turning teacups into rats. I was the only one who saw her for what she was — a FREA-“
Snape angrily makes his way over to Petunia, pointing his wand at her “Finish that sentence, I DARE YOU!!!”
“Severus, stop this now!!!” Mcgonogall demanded.
Snape lowers his wand, but the glare is still present on his face.
“Potter’s had his name down since he was born, not that you care. And contrary to the insolent belief that you’ll stop him, he most definitely WILL be going. And I don’t reccomend attempting to hinder him.” Snape says coldly.
“Maybe if she NEVER MET YOU, she and that husband of hers would’ve never gotten themselves blown up by that lunatic-“
“Blown up? You told me a car accident killed my parents!!! You said that’s how I got this” Harry yelled to Petunia, pointing to his scar.
“A CAR CRASH?!?! A car crash took his parents?!?! RUBBISH!!!” McGonagall sneered.
“I won’t be paying for some crockpot old fool-“
“NOT! ANOTHER! WORD!” Snape threatened. “Unless you’d like to live the rest of your days with a pig’s tail” he pointed his wand at Vernon. “Now, we will be taking Mr. Potter to get his school supplies. Should he arrive in an inadequate state I can personally assure you, YOU WILL REGRET IT”
“Come, Harry” McGonagall says, and Harry follows them.
ETA: I might continue this.