Mandrake is an incredibly useful tool in Hogwarts Legacy. This fairly rare - in the early game, at least - tool will stun everyone in your vicinity, making it absolutely essential if you start to get mobbed.

There are a few places you can get your hands on some Mandrake, allowing you to use it in combat - and thus, stun 10 enemies, and get this trophy.

Firstly, once you have access to the potting station in the greenhouse of Hogwarts, after completing the Herbology Class main mission (the 10th main mission), you can plant and grow a Mandrake there. For that you’ll need to buy the seeds from Dogweed and Deathcap in northern Hogsmeade. Then, when you have them, you can plant them in the greenhouse (empty the pot using the left click after you’ve inspected it to dispose of the Dittany). This method will create a batch of 3 every 10 minutes.

If you don’t have the patience to wait for them to grow, you can always buy ready-to-use Mandrakes from Leopold Babcocke’s Wander Shop - which moves around, but I always found him just west of the East North Ford Bog Floo Flame (just look for the coin icon out in the wilds). This is a far more expensive way to get the Mandrakes you need, but definitely quicker.

The trophy itself requires nothing special, apart from using it and stunning 10 enemies. Not at once, mind. Just 10. Cumulatively.