Crystal deck,again?

I really like what you have done with it. But i would change just one thing. Because of Rainbow ruins industructable ability, you only need one. if you have two because its easier to draw, switch one out for last resort. also, to answer your question, heart of clear water is a bad idea, because they can attack it over and over and it will never die! if they have monsters with built-in fairy meteor crush abilities, that would be bad! also, if possible, run a playset of raigeki. its a great card in a tight pinch, and if you play against a mill deck, you are going to want more than 40 cards. i would also take an abundance out. yes, its great, but when i ran three in my crystal deck, i got very frustrated when i ended up with two in my hand and nothing on the field. replace it with a march of big animals, because even your continous spell crystals are considered beasts!