Thanks to the new Structure Deck, known as Legend of the Crystal Beasts, there are many ways to bring forth the seven... wait a minute, there are eight now. OK, if you want to bring out all the Crystal Beasts to summon an "Ultimate Crystal" monster, this Deck has many new cards to do so.
The fastest way to summon an "Ultimate Crystal" monster (namely, "Rainbow Overdragon") is "Ultimate Crystal Magic", which can activate immediately if you ram one of your monsters into a stronger one and deliberately destroy it. After that, you can Tribute the Fusion Summoned "Rainbow Overdragon" and summon "Ultimate Crystal Rainbow Dragon Overdrive". If your opponent has no counter, this will most likely end as a One Turn Kill.
If you want to watch your opponent squirm and stall for time, "Ancient City - Rainbow Ruins" provides a plethora of effects, depending on the number of Crystal Beasts in your Spell & Trap Zones, while "Advanced Dark" allows you to prevent Battle Damage as long as you can send a Crystal Beast from your Deck to the Graveyard. For those who wish to use "Rainbow Ruins", "Crystal Tree" will help immensely, but try to limit your Crystal Counters to 2 or less.
"Awakening of the Crystal Ultimates" will definitely aid you in bringing out your key cards, be it a "Rainbow Bridge" card or "Rainbow Refraction", or a "Crystal Beast" monster. "Ruby Carbuncle" and "Sapphire Pegasus" will benefit the most from these. Also, "Rainbow Bridge of the Heart" and "Rainbow Bridge of Salvation" are the best "Rainbow Bridge" candidates to draw with that Quick-Play Spell's effect.
Now that you know the basics, give this Deck a workout and see where it gets you. And as always, keep smiling, and keep dreaming.