Gem-Knight Ruby
Pyro / Fusion / Effect
EARTH / 
6"Gem-Knight Garnet" + 1 "Gem-Knight" monster
Must first be Fusion Summoned with the above Fusion Material Monsters. Once per turn: You can Tribute 1 face-up "Gem-" monster; this card gains ATK equal to the Tributed monster's ATK on the field, until the End Phase. If this card attacks a Defense Position monster, inflict piercing Battle Damage to your opponent.
2500/1300
CARD ID: 76614340
STATUS TCG: Unlimited
Powered by yugioh.wikia.com
| TCG Set | Symbol | Rarity | Low | Avg | Trend | |
|---|---|---|---|---|---|---|
| Duel Terminal 5a | DT05-EN034 | Duel Terminal Ultra Parallel R | -,--€ | -,--€ | -,--€ | |
| Hidden Arsenal 5: Steelswarm Invasion | HA05-EN019 | Secret Rare | -,--€ | -,--€ | -,--€ |
This card is named after the mineral ruby.
This monster resembles Tajadol Combo from Kamen Rider OOO.
There is a small mark that resembles a drop of water under the gemstone on this monster's chest-plate. This is hinting that the Fusion partner of Gem-Knight Garnet to form this monster is an Aqua Gem-Knight monster. It is supported by some blue trim on its armor, the same color as either Gem-Knight Sapphire or Gem-Knight Iolite.
This monster resembles Tajadol Combo from Kamen Rider OOO.
There is a small mark that resembles a drop of water under the gemstone on this monster's chest-plate. This is hinting that the Fusion partner of Gem-Knight Garnet to form this monster is an Aqua Gem-Knight monster. It is supported by some blue trim on its armor, the same color as either Gem-Knight Sapphire or Gem-Knight Iolite.
OCG Rulings
"Gem-Knight Ruby" can be Special Summoned from the Graveyard by another card's effect, but only if it was properly Fusion Summoned before being sent to the Graveyard.: Fusion Monster > Gem-Knight Ruby
The text "This monster can only be Special Summoned by Fusion Summon (from the Extra Deck) using the above cards as Fusion Material Monsters" of cards like "Gem-Knight Ruby" also prevents you from Fusion Summoning it from the Extra Deck by using a monster with an effect like that of "King of the Swamp" or "Goddess with the Third Eye" as a Fusion Material Monster.: When Fusion Summoning "Gem-Knight Ruby", can you use a monster like "King of the Swamp" as a substitute Fusion Material monster?: Can you use "Goddess with the Third Eye" as a Fusion Material for "Gem-Knight Ruby"?