[STRATEGY] GATHER THE CRYSTALS FOR "RAINBOW DRAGON" To Summon "Rainbow Dragon", you need all 7 different "Crystal Beast" monsters on the field or in your Graveyard. When one of your "Crystal Beasts" is destroyed by battle, instead of letting it become a Spell, activate "Crystal Pair" instead. This way you will have one "Crystal Beast" in your Graveyard, and a different one on the field as a Spell. Not only does it help you get the last "Crystal Beasts" you need, but it saves you from taking any Battle Damage that turn too!