"Gaia The Fierce Knight", known as "Gaia the Dark Knight" (暗黒騎士ガイア Ankoku Kishi Gaia) in Japan, is an archetype of Level 7 Warrior monsters that includes "Gaia The Fierce Knight" and monsters based on it who all have 2300 ATK and 2100 DEF. All members are DARK, EARTH or LIGHT-Attribute.
This archetype is related to the "Black Luster Soldier" archetype. The "Gaia Knight" series is a subset of this archetype, although it is excluded from support.
"Gaia The Fierce Knight" appears as a character in Yu-Gi-Oh! Duel Arena.
|Gaia The Fierce Knight
||Normal Summon without Tributing by controlling fewer monsters than your opponent
||Normal Summon without Tributing, but this card's original ATK becomes 1900 instead of 2300
||Special Summon by controlling no monsters while your opponent controls at least one monster
||Normal Summon without Tributing by controlling no monsters, OR if your opponent controls a monster with 2300 or more ATK
||Special Summon by Tributing 1 Dragon Fusion Monster
||Normal Summon without Tributing by having no other cards in your hand
Any "Gaia the Fierce Knight" monster can be used with any Dragon monster to Fusion Summon "Sky Galloping Gaia the Dragon Champion", which in turn searches for the "Spiral Spear Strike" Spell Card upon being Summoned.
"Arisen Gaia" and "Charging Gaia" can become part of a Warrior Chaos engine with "Exchange of Night and Day".
"Gaia Knight" monster cards can be mixed with the "Black Luster Soldier" archetype Monsters for the two "If this card is Tributed" effects of "Arisen Gaia" and "Charging Gaia" can add a "Black Luster Soldier" Monster or Special Summon a "Soldier" from the Hand or Graveyard.
A common trait among the "Gaia The Fierce Knight" monsters, except for the original "Gaia The Fierce Knight", is that they can be Normal Summoned to the field without needing any Tributes depending on certain conditions, such as having no other cards in the hand or having fewer monsters than the opponent. This allows them to hit the field faster, granting the player powerful monsters quicker, as they'd all normally require two Tributes to be Normal Summoned otherwise. "Lord Gaia" can be Special Summoned if you control no monsters while your opponent does, in vein of "Cyber Dragon" and "Hieratic Dragon of Tefnuit".