Sirius was feeling bored during his Potions class. Professor Grekson, the potions teacher for the seventh year, was droning on about a potion they had already completed before. Sirius had been considering dropping out of the subject for a while now, but he knew it was necessary for his future career as an Auror. Despite his boredom, he knew he had to pay attention.

"Is this fine, Professor?" Evans asked from the front of the classroom.

"Sirius. What are you doing?" James hissed.

"It's fine. What's got you in a knot?"

"It's simpler to do this," James took over, and Sirius couldn't help but pay attention. James had methods to simplify Potion making, learnt from Fleamont.

Their Potion glowed, but James seemed unbothered. Professor Grekson walked over to them. "A potion doesn't glow, Mr Potter, Mr Black,"

"He's not 'Mr Black' anymore, Professor. And you'll find potions glow at times," James said calmly.

"Your Dad tell you that, did he?" Grekson sneered.

Grekson was a good friend of Archer Black (Sirius Grandfather) and was a blood purist. Fleamont had always been a better Potioneer, but Grekson refused to admit it. He framed Fleamont for 'cheating' a couple of years ago in a potions competition after Fleamont had won, such was his hatred for James' father.

"No, but Horington's Potion Gems do," James replied. Evans' head whipped around and stared at him.

"You can't get that book, Potter," Snape sneered, red with anger.

"It never was published," Evans added.

"I happen to remember a limited edition hitting shelves," He said, keeping eye contact with Grekson.

"He brought two books," He was growling. Sirius couldn't remember the book. "His own, and a copy he made," He was coming dangerously close to James and Sirius held James protectively. "He never sold a single one,"

"Being the son of Slevin Horington's best friend has its advantages," James shrugged. The class was deadly silent. Sirius could hear the breaths of other students and the Potions' bubble.

"10 points of Gryffindor for stealing a book," He turned around. "And 10 for back talking. Oh, and a 'T' for the assignment. It's not doing what it's supposed to do,"

James rolled his eyes, unbothered, but Sirius wouldn't take this lying down. "He didn't steal the book!" The Professor stared at him, danger dancing in his eyes. Sirius persisted. Two could play this game. "And the Potion is perfect. It's supposed to be light blue and smell like a troll," He stared hard. "Unless you changed the assignment without telling us, for which you could get suspended,"

The Professor gave Snape a 'what are you waiting for' gesture before walking forward. Snape cast a spell towards them, and the Potion blew up.

"T. Class dismissed," He smiled devilishly.

"I can't, ugh," Sirius fumed. "And it cost you your eyebrow," He stopped, glaring at James. "Why aren't you BOTHERED,"

"Because, love, we're filing a complaint against Grekson with Dad's help. After a certain point of misdeeds, he'll use his Potioneering license and won't teach. Just handle him until the winter Holidays,"