This level (like the previous one) contains many sublevels. Each sublevel will end, when you get the Triwizard Shield. So you have to come back to this level several times.
You will start in this place. On the right you will see your first mini-shield. Move a rock with Wingardium Leviosa (C) and take the mini-shield.
Go straight ahead, on the way jinx your first dragon statue. Near a tree trunk you will find your second mini-shield.
Now from the tree trunk go in this direction. You will see your third mini-shield, but the way to it is blocked by mushrooms.
Use Carpe Retractum (C) and catapult a bubotuber at the mushrooms to free the way. After that take the mini-shield.
Now go straight ahead and use bubotubers to destroy mushrooms on your way.
You will be attacked by dugbogs. Kill them and continue your way. Climb up the ledge.
Near three bubotubers you will notice your fourth mini-shield. Go there and try to summon it with Accio (Z). If it doesn't work, go back to the ledge and use a cauldron (C) to destroy the bubotuber. Now run quickly and take the mini-shield.
Suddenly a dragon will appear. The dragon will fire the ground in front of you. Put out the fire with (C) and continue your way.
When you walk to this place, turn to the left. After a while you will get to the place, where you will notice your. First jinx (X) your first mushroom, which is on the right.
Now put out the fire, take your fifth mini-shield and pull a log with Carpe Retractum (C).
In this place, use bubotubers to destroy mushrooms and get to your sixth mini-shield.