Draco, Snape and Bellatrix | Walkthrough HP and the HB Prince Guide

This time you must stalk Draco and Snape. Follow them across the corridor [1], but don't get too close to them. However you also can't stay behind too much or else you'll lose them. After the corridor, follow them on the stairs [2].

After getting to the 7th floor go through the door [1] and eavesdrop on their conversation [2].

A cutscene will play and after it, you'll meet Bellatrix [1]. The fight will begin shortly after. In order to quickly win this duel, knock down the witch with Expelliarmus and finish her with charged up Stupefy [2].

You will have to repeat the fight once more [1]. You can use the same trick to win. After dealing with Bellatrix you will have to defeat Fenrir [2]. He's got quite a bit of stamina, but the tactic from before works well this time as well.