"Rainbow Overdragon" Rating Score by 福人ズッコケ

A Fusion Monster that combines the power of 7 Crystal Beasts.
Even if it's not a fusion summon, you can use it as a special summon if you release the Ultimate Jewel God, but since there's little merit in doing so, it's basically a card that you want to use as a regular fusion. It would be good to store Crystal Beast in GY and use Dragon's Mirror, or aim for deck fusion with Ultimate Crystal Magic. However, it is painful to exclude him in Dragon's Mirror, and "Ultimate Crystal Magic" requires "7 types" of gems, so it is necessary to build his own deck.
By excluding one GY Crystal Beast, the activation effect that raises her ATK for her ATK of that monster, and the triggered immediate effect that returns all the cards on the field to the Deck by releasing the fusion summoned self have
The effect that strengthens itself cannot be used during the opponent's turn, and since this card originally has 4000 RBI, it's not that important of an effect, so it should only be used in an emergency.
The effect that activates when you release yourself is quite strong, but the drawback is that you have to release this card that you put out. This card will also return to his deck, so don't put too many here either.