Add 1 "Crystal Beast" monster from your Deck to your hand, and place 1 "Crystal Beast" monster with a different name from your Deck face-up in your Spell & Trap Zone as a Continuous Spell. You can only activate 1 "Crystal Bond" per turn.
Use Crystal Bonds to add any Crystal Beast monster to the hand and put another one into your spell/trap zone. The best target to add to hand usually is Crystal Beast Sapphire Pegasus. You can then summon Sapphire Pegasus to add another Crystal Beast into your spell/trap zone, searching a total of 3 cards just by using Crystal Bonds.
You are able to Special Summon 1 “Crystal Beast” monster from your Spell/Trap zone by using Crystal Promise. Rare Value is able to boost your draw power, by having 2 “Crystal Beast” cards in your Spell/Trap zone, and your opponent will choose 1 “Crystal Beast” card to send to your Graveyard, and you draw 2 cards. Crystal Release is one of the powerful support card for Crystal Beasts because it not only boosts the equipped “Crystal Beast” monster’s ATK by 800, but it is also able to place 1 “Crystal Beast” monster directly from your Deck to your Spell/Trap zone. Rainbow Path is able to negate 1 attack from your opponent’s monster, and then search for 1 “Rainbow Dragon” directly from your Deck to your Hand.
Well yeah, because it's a support card for that deck. That's like saying Magician's Navigation is bad because it only works in Dark Magician decks. The card was made for Crystal Beasts, and as such it should be judged on how well it works in a Crystal Beast deck, and in a Crystal Beast deck this card is never situational, pretty much always activatable and gives you a +1 in card advantage.
Very cute artwork... to bad they give it at lvl 45(?)