Murtlap essence. Okay. Sky found that and added the required ten drops. She pick up her wooden stirrer, cast a quick "Scourgify!" on it, and used it to stirred her potion. "1… 2… 3… 4… 5… 6… 7…8." Counterclockwise, of course. And now the parsley. She picked up the two sprigs and crushed them in her hand over her cauldron, adding the falling flakes to the potion. All the while resisting the urge to compare that technique to the one chefs use to add seasonings to food. Yep, did not want to go there!