Water Ninja

Hello penguins want to be a water ninja in 5 easy steps. follow this steps to be water ninja
1 Go to card-jistu court-yard you can see I had marked red circle that go on click on that door in you're clubpenguin

 2 Now you will be in card-jistu water! Now talk to Water Sensie

3 Start earning you're water suit!

4 Collect all the water suit at last you will receive Helmet of oceans to defeat Sensie

5 When you will defeat Sensie you will receive Water gem by Water sensie!

Congrats you are now water ninja! I hope this guide was helpful to you.