Where can I cast the magic spells

Hint 1 of 5:

Have you searched the house well?

Hint 2 of 5:

Search in the study.

Hint 3 of 5:

Look closely in the books.

Hint 4 of 5:

Move the lever to open a secret stairway.

Hint 5 of 5:

Don't fall over the cat on the way down to the basement!