AppGamer Answered:
There are a number of things you need to do in order to unlock Wingardium Leviosa, but once you have it you'll be able to cast it and move things in the game incredibly easily.
There are two main steps to getting Wingardium Leviosa:
1) Complete Professor Garlick's First Assignment
You can get access to this assignment after you have completed 'In the Shadow of the Estate'.
During the quest you need to get Venomous Tentacula and Mandrake and use them on an enemy in battle.
Both of these items can be purchased at the Dogweed and Deathcap shop in Hogsmeade or you can try growing them yourself! But to do this you will need to have unlocked the Room of Requirment.
To utilise these plants in battle, select them as a deployable plant and release it before the battle is over.
Specifically for the mandrake, you'll need to use this against multiple enemies at the same time or order to complete the task.
2) Attend Herbology Class and go back to Professor Garlick
After you have completed the battles with your plants, head back to the Herbology Classroom and attend a class during the day. When class is over talk to Professor Garlick and you should get to learn Wingardium Leviosa.
If you are still looking for help with this game we have more questions and answers for you to check.
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