I decided to build this deck after the Crystal Beast Structure Deck release and after the YCS Utrecht performance of the Crystal Beast's deck list
Morever, I used to play Marincess previously, which is really difficult in the current metagame. Then, I've been convinced that Crystal Beast is a great choice ATM as an Anti-Meta deck.
This decklist is not very expensive (if you do some modifications in the Extra deck even though Zeus and Goddess are really good cards to keep). However, if you want to upgrade this list, I highly recommand you to replace Pot of Extravagance by Pot of Prosperity (which is more consistent to search our tools and keep our main Extra deck's tools)
Feel free to give your feedback and ideas in the comment to improve this list :)
Thanks all!