Blaise leaned back behind his heavy mahogany desk as he eyed the hourglass in front of him. The room was dimly lit, but Blaise didn't seem to notice. Most of the light in the room came from a fire beneath the small cauldron next to the Potions Master's desk, which was currently holding a slowly boiling Potion. While the sand in the hourglass ran down Blaise drew slow circles in the air with his wand, the Potion copying the movement. Blaise didn't look directly at the cauldron, sure of what he was doing, letting his eyes wander though his office.
The heavy door to his right led to the cabinet in which he kept his private ingrediënts. Next to that there was a showcase which held various rare objects Blaise had collected through the years, visiting bizarre places and sinister shops. A wooden chest held various bottles with all kinds of personally brewed Potions, of course securely locked in case some of his students were reckless and crazy enough to try to help themselves.
There were some bookcases standing against the walls, filled with encyclopedia's on herbs and ingredients, various books on Potions and recipes and other books that had one way or another something to do with Potions, except for two rows of books about the Slytherin House and the History of Hogwarts. Most of that section looked as untouched as it was, Blaise knew more than he wanted to know about the castle. Though, being the Head of Slytherin the various books were seen as standard material in his personal collection.
When he thought it was time Blaise stopped stirring and stood up to take one of the bottles from his desk and let three small drops fall into the cauldron. The Potion made a hissing sound as the drops hit the surface and started changing colour until it was a vibrant yellow. One of the corners of his mouth pulled upwards as Blaise watched the result, and then his eyes flew up when he heard a knock on his door. “Enter,” he called, sitting down again as he pointed his wand at the fire for the last time. One more time heating until it boiled and the potion would be ready. There was already an empty flask waiting on his desk, now Blaise could only hope this visitor wouldn’t disturb the last stage of the Potion.