The Black Lake

This part of our guide takes you through all of the steps needed to complete The Black Lake

1) Shoot the 9 clams to get the Blue Crest piece.

2) Shoot the pale creature that appears six times to inflate its head and get the Red Crest piece.

3) Swim to the pipe, enter it and head to the left.

4) Use Wingardium Leviosa to move the skeleton boat out of the way.

5) Go through the three pieces of pipe, clearing obstacles as you go.

6) Connect the pieces you eventually find on the right to the circular piece on top of the tall platform.

7) In the second area go to the right and take the lower path.

8) Pull the large crab out of the crevice then place it on top of the bubbles so your partner can go through.

9) Switch to your partner and shoot the eye of the squid to clear the path.

10) Remove the seaweeds using the spell Lumos Solem.

11) Remove the black ink left behind by the squid using Lumos Solem to reveal the Yellow Crest piece.

12) Get the pearl and give it to the clam blocking your path.

13) Avoid the mermaids in the third area.

14) Interact with the boulder you need to detach the anchors on each side, then use Wingardium Leviosa to place the worms in the boulder.

15) Repeat with the other boulders to get the Red Crest piece.

16) Go through the pipe and place the purple ball on the balance.

17) Raise the anchor, then shoot on the chain plates to free all the students.

Re-run

Use dark arts at the start of the second area to open the chest. Use CR or Wingardium Leviosa to reconstruct the skeleton for it to pull the chain to reveal the piece.

Hogwarts

1) Wave at the painting to move the stairs then go up.

2) Use RE on the chest, then use Wingardium Leviosa to place the steering wheel to the painting.

3) Shoot the painting to move the stairs again.

4) Go upstairs then shoot the bell on the door to open it.

5) Shoot the paintings.

6) Take the stairwell to continue.

Our LEGO Harry Potter: Years 1-4 walkthrough continues with The Dark Lord Returns