Thread:Beboper/@comment-71.177.227.191-20140405220856/@comment-5428123-20140406005345

Go to this guide and scroll down to the Cerulean Essentia section. It will show you step by step. Just know that you need at least one Shining Aquastone, so if you don't have one, you're out of luck and will need to buy the card from someone else.