Summary:
Harry has to write a potion essay. Sirius is bored and want to help.
A/N: I wrote that One-Shot for my best friend. I hope you like it. ;)
"Hey cub. What are you doing?"
"Potion Essay."
"I help you, shall I?"
Harry looked at him doubtfully. He knew Sirius was bored and that means only one thing: chaos. "Um... no. It's pretty easy, and I think it's better when I..."
"Awww... come on kiddo! Let me take a look."
"Sirius, no..."
But Sirius already looked at the essay.
"Well well, undetectable potions. I have an idea!"
"Oh God, no", Harry sighed.
"What about brewing an undetectable potion and give it Snape?"
"We just have to write about it, Sirius..."
"The git has to see you're able to brew one. And if he drinks it... accidently, of course, I'll make sure, someone writes on his gravestone 'Brewed potion, taught potion, drunk potion'."
Sirius hoped Harry would understand his way of humour, but his godson just stared at him like he's gone mad.
"Sirius, I don't like Snape either, but you can't kill him!"
"You're like your father, Harry. Both ruining my ideas of killing Snape!"
