Now go downstairs and get to this place. Use the cauldron to destroy the wall on the left and then another on the left.
Now destroy the all in front of you, put out the fire and destroy another wall.
Go straight ahead destroying all the walls. On your way you will find two choc frogs. Remember this place, if you will need extra lives, you can always go back here and take another frogs.
Now you have to get rid of a salamander and then you can take your fifth mini-shield.
Go straight ahead and then turn to the right. Put out the fire and use cauldrons to destroy four statues. You will get your sixth mini-shield.
Now from this place, turn to the left. Put out the fire on your way.
You will get to this place. here you have to kill salamanders and destroy their sources.
After that you can jinx your fourth dark detector and fourth dragon statue.
Now you have to use cauldrons to smash two tower support. When you do it, you will get your seventh mini-shield.
Now it's time to smash support of the big tower. Use a cauldron and destroy it. The big tower will drop down and the next Triwizard Shield is yours.