In the story mission, “Secrets of the Restricted Section,” you’ll naturally unlock a couple of spells. Firstly, Disillusionment, which makes the main character invisible, and secondly, Petrificus Totalus, which is a stealth takedown that effectively turns the target to stone and then evaporate. These are your stealth tools.

In order to get this trophy all you need to do is stealth takedown a total of 50 enemies. Now, combined with Disillusionment, this isn’t too hard. Just wait till an enemy is turned the other way and sneak up behind them.

However, if you get all 4 Stealth Talents, then you’ll be an unstoppable stealth juggernaut. The two level 5 upgrades make it harder to be detected, while also allowing you to run while using Disillusionment. The level 16 talent makes it even harder for enemies to see you, but the level 22 upgrade allows you to take multiple foes down at once with one use of Petrificus Totalus.

Once you’ve got all 4 abilities, you can basically take out an entire camp without them seeing you, in a matter of minutes. Just cast Disillusionment, run in, and take down the foes before they know what’s happened.