(Once again, you are out at night.
Now remember, both night and day has its own set of secret areas.
So if you visited some in the day time, be sure to do so again at
night as well so you get all the secret areas)
You are out at night and have to
follow Ron to talk to Hagrid. When starting out, turn right and
look for carpet on ground. Use it to get to secret area with Bronze
Card (43/50). Now go down the steps to where the diffindo challenge
is. Open the lightning shaped wall and cut branches. Ligh gargoyle
and go back up the stairs, and to the wall on the other side. Climb
up and turn right. You will see one block that looks out of place.
Jump on it to open a secret area right in front of you. Get out
of the secret area and go to where you opened the other secret area.
There, you will find a carpet. Spongify to get to the high landing,
containing a Silver Card (35/40). Now follow Ron to Hagrid's Hut.