The seven "Crystal Beasts" appear in the artwork of "Crystal Conclave"
"Crystal Beast", known as "Gem Beast" (
The "Crystal Beasts" made their first appearance in the Yu-Gi-Oh! GX anime, used by Jesse Anderson. In the English dub, each of the "Crystal Beast" monsters, except "Ruby Carbuncle", imitates the voice of a real life movie celebrity. Upgraded forms known as the "Advanced Crystal Beasts" were used in the anime, although they have not been released in the TCG or OCG.
The "Crystal Beasts", whose original name is "Gem Beasts", as their name says, are all animals which have each a different kind of gem in their bodies. Their different gems' colors form the seven colors of the rainbow, reflecting the name and design of their ace, "Rainbow Dragon". Their nomenclature is "Crystal Beast (gem) (animal)", and their attack names are "(gem) (part of their body/attack)".
In their Advanced form, their attack names keep the same, with the addition of the word "dark" between the gem and the attack/part of their body.
|Color||Crystal Beast||Origin||Unique effect|
|Red||Ruby Carbuncle||Ruby||Carbuncle||Special Summon as many "Crystal Beast" monsters from its controller's Spell & Trap Zone as possible when it is Special Summoned.|
|Orange||Amber Mammoth||Amber||Mammoth||Redirects an attack targeting another "Crystal Beast" monster on its controller's side of the field to itself.|
|Yellow||Topaz Tiger||Topaz||Tiger||Gains 400 ATK when attacking an opponent's monster during the Damage Step.|
|Green||Emerald Tortoise||Emerald||Tortoise||Changes one of its controller's monsters that attacked this turn to Defense Position once per turn.|
|Blue||Cobalt Eagle||Cobalt||Eagle||Returns a "Crystal Beast" card on its controller's side of the field to the top of their Deck once per turn.|
|Indigo||Sapphire Pegasus||Sapphire||Pegasus||Places a "Crystal Beast" monster from its controller's hand, Deck, or Graveyard face-up in their Spell & Trap Zone as a Continuous Spell Card when it is Summoned.|
|Violet||Amethyst Cat||Amethyst||Cat||Attacks the opponent directly, but the battle damage it inflicts when using this effect is halved.|
"Crystal Beast" Decks tend to have a wide variety of searching options for putting "Crystal Beast" cards on the field, either Summoned as monsters or placed in the Spell & Trap Zone as an effect-less Continuous Spell Card, and they have a couple of extra drawing options to speed up the use of the Deck. Because of these effects working together, "Crystal Beast" users can wind up many cards ahead of their opponent, and the various searching options facilitate the Summoning of "Rainbow Dragon" far quicker than would otherwise be possible. The archetype also supports come-from-behind wins quite easily due to the double whammy of "Crystal Abundance", which wipes out everything on the field and then swarms the field with monsters from the Graveyard, and the Field Spell Card of the set, "Ancient City - Rainbow Ruins", gains a new effect for every Continuous Spell Card "Crystal Beasts" you control. The archetype is also somewhat resistant to opponents who use Spell and Trap destruction effects, as a couple of cards can quickly put the "Crystal Beasts" in Spell form back onto the back row from the Graveyard, and the Field Spell Card resists being destroyed itself.
Although "Rainbow Dragon" is the boss monster of this archetype, its inclusion is more likely to be a hindrance, to bring it out quickly, players need a good strategy to get Crystal Beasts out in one turn; or two turns if your hand is not good. Because of this, "Hamon, Lord of Striking Thunder" is often used in its place, but "Malefic Cyber End Dragon" avoids both the lengthy set-up and the hefty costs of the previous bosses, and boasting the same 4000 ATK but it can be removed easily from the field due to the fact that it gets destroyed once your Field Spell card is removed from the field. Malefic Cyber End Dragon requires a Field Spell to be Summoned and is the only monster to attack once it is on the field, so you may not want to put this card in your Deck.
One of the most viable "Crystal Beast" strategies is to create a Lockdown, preventing the opponent from making any moves. "Ancient City - Rainbow Ruins" can negate the opponent's Spells and Traps, while a simple Xyz Summon can have "Number 16: Shock Master" negate monsters. Alternatively, "Fossil Dyna Pachycephalo" can stop Special Summons, and "Number 39: Utopia" will prevent attacks.
With the introduction of Xyz Monsters, "Crystal Beasts" have become a more difficult Deck to use. With impressive swarming abilities, a "Crystal Beast" player can easily Xyz Summon two or three times in one turn. However, when these Xyz Monsters are destroyed, all of those "Crystal Beasts" will be trapped in the Graveyard, requiring slow pick-up from "Sapphire" Summons, or risking "Crystal Blessing", which will not always have targets. The key is to Xyz Summon only when absolutely necessary, as excessive overlaying will exhaust the Deck's longevity in no time.
- Crystal Beast support cards such as "Crystal Beacon" reference monsters in the Spell & Trap Zone. Because these effects do not specify that the "Crystal Beasts" must be in their Continuous Spell Card form, you can use them even if they're being equipped by effects such as that of "Destiny HERO - Plasma".
- If a card such as "Macro Cosmos" is preventing cards from reaching the Graveyard, this will NOT prevent "Crystal Beasts" from using their effects (as they would never hit the Graveyard in the first place).
- While "Dimensional Fissure" is active, Crystal Beasts that are removed from the field by cards like "Rare Value" or "Mystical Space Typhoon" will be sent to the Graveyard, not banished.
The management of maintaining vacant Zones in the Spell/Trap Card Zones can be irksome sometimes for these kind of Decks due to the balance between "Crystal Beast"s in said Zone for certain support cards as well as regular Spell/Traps to help this Deck further, a possible annoyance that can be hustled via cards like "Xing Zhen Hu", "Xing Zhen Hu Replica" and "Seismic Shockwave".
Cards like "Banisher of the Light", "Dimensional Fissure", "Masked HERO Dark Law" and "Macro Cosmos can cripple this Deck since you can't Summon "Rainbow Dragon" on banished Crystal Beasts, albeit they're easily counterable with "Imperial Iron Wall" and "Chaos Hunter". However, if "Rainbow Dragon" or "Hamon" were Summoned, they can easily be iced with "Torrential Tribute", the "Solemn" Counter Traps and "Bottomless Trap Hole". Further, "Fortune Lady Fire", "Nitro Unit" and "Mini-Guts" can also threaten "Rainbow Dragon" and "Hamon" because of the massive Burn damage that's the result of these effects. "Shield & Sword" and "Inverse Universe" can also force "Rainbow Dragon" off the Field through battle and regardless if its abilities are activated before then, that's still a foremost horsepower monster off the Field.
"Banisher of the Light", "Masked Hero Dark Law" and "Macro Cosmos" will also stop your opponent from activating "Crystal Abundance."