You are a 6th year student in Hogwarts, at the ferst year you were sorted in the Ravenclaw house. You are in Professor Slughorn's potions class now. Professor has divided the students into pairs and you have to work with the prefect of the Hufflepuff house, also a 6th year student, the arrogant and self-confident Ernie Macmillan. Together you must prepare the Antidote to Common Poisons potion. You have one common cauldron for two, the necessary ingredients are laid out on the table, but not all and they are wasn't really prepared for creating potion. They wasn't crush or cut, students must do it by themselves.

You've known Ernie for a long time, but the two of you had barely communicated before.

You opened the textbook to the right page and was horrified because the potion was very complicated. The recipe was as follows:

1. Add 1 Bezoar to the mortar Crush into a very fine powder using the pestle 2. Add 4 measures of the crushed Bezoar to your cauldron 3. Add 2 measures of Standard Ingredient to your cauldron 4. Heat to a medium temperature for 5 seconds 5. Wave your wand 6. Add 1 pinch of powdered Unicorn Horns to your cauldron 7. Stir 2 times, clockwise 8. Add 2 Mistletoe Berries to your cauldron 9. Stir 2 times, anti-clockwise 10. Wave your wand to complete the potion

When you finished reading the recipe, you looked up in surprise at Ernie, who looked unhappy.

“Well, are you going to crush Bezoar or are you expecting me to do everything?” Ernie asked and arched an eyebrow