1. First of all, you need to accumulate degenerate values by completing some tasks in Educating Hermione 2. These tasks are to assign some evil or dark actions. With the increase of depravity, you will gradually gain more strength and influence, and at the same time become more evil and dangerous.

Secondly, after improving Hermione's depravity, you need to go to the potions class to find Snape, where you can interact with Snape and learn all kinds of magic and skills.

Finally, Snape will become a mentor to help further develop his magic ability.