So, I heard Gem-Knights need more consistency...

[Lonk]

Gem-Knight Cobalt
Level 4
EARTH
Aqua/Effect
ATK/500 DEF/2000

When this card is Normal Summoned or Special Summoned: add 1 Spell or Trap card, from your Deck to your hand, that Special Summons 1 "Gem-Knight" Fusion Monster from your Extra Deck. This card is treated as a Normal Monster while in your Graveyard.

Gem-Knight Agate
Level 4
EARTH
Thunder/Effect
ATK/1500 DEF/1300

If this card is face-up on the field: you can use your opponent's monsters as Fusion Materials for the Fusion Summon of a "Gem-Knight" monster. If this card is used for the Fusion Summon of a "Gem-Knight" monster: you can use any monsters for the Fusion Summon of that monster (You still must have the needed number of monsters required for the Fusion Summon). This card is treated as a Normal Monster while in your Graveyard.

Gem-Knight Morganite
Level 4
EARTH
Pyro/Effect
ATK/1900 DEF/400

When this card is used for the Fusion Summon of a "Gem-Knight" monster: Draw 1 card. This card is treated as a Normal Monster while in your Graveyard

Gem-Knight Moonstone
Level 3
EARTH
Rock/Effect
ATK/1000 DEF/1000

If this card is sent to the Graveyard: you can add 1 card, from your Deck to your hand, that Special Summons a "Gem-Knight" Fusion Monster from your Extra Deck.

Gem-Knight Peridot
Level 9
LIGHT
Rock/Effect
ATK/0 DEF/0

You can discard this card: Send, from your hand or your side of the field to the Graveyard, the Fusion Material Monsters that are listed on a "Gem-Knight" Fusion Monster Card, then Special Summon that monster from your Extra Deck (This Special Summon is treated as a Fusion Summon).

Gem Cat
Level 2
EARTH
Rock/Effect
ATK/300 DEF/700

Once per turn; you can return 1 "Gem-Knight" Fusion Monster you control to the Extra Deck: Special Summon 2 "Gem-Knight" Fusion Monsters from your Graveyard.

Gem-Knight Mystic Quartz
Level 7
LIGHT
Rock/Fusion/Effect
ATK/2450 DEF/1950

1 "Gem-Knight Crystal" + 1 "Gem-Knight" Monsters
Once per turn: can Banish 1 Card in your Graveyard that Special Summons a "Gem-Knight" Fusion Monster from your Extra Deck: Draw 2 cards. You can discard 1 "Gem" card and add 1 card from your Banished Zone that Special Summons a "Gem-Knight" Fusion Monster from your Extra Deck.

Gem-Knight Sphalerite
Level 9
EARTH
Rock/Fusion/Effect
ATK/3300 DEF/2700

3 "Gem-Knight" Monsters
Cannot be Special Summon except by a Fusion Summon. Once per turn; you can Banish 1 "Gem" monster in your Graveyard: the Levels of all face-up "Gem" monsters you control are equal to the Level of the Banished monster. If this card is banished: Draw 3 cards.

Pressure Mines
Field Spell Card

All "Gem-Knight" monsters gain 400 ATK. Neither player can activate any card effects in the response of a card that Special Summons a "Gem-Knight" Fusion Monster from your Extra Deck or when a "Gem-Knight" monster is Special Summoned on the field.

Crystal Conduit
Normal Spell Card

Banish, from your Deck to the Graveyard, the Fusion Material Monsters that are listed on a "Gem-Knight" Fusion Monster Card, then Special Summon that monster from your Extra Deck during your next Standby Phase (This Special Summon is treated as a Fusion Summon).

Gem Shield
Normal Trap Card

Banish any number of "Gem" monsters in your Graveyard and target that many "Gem" monsters you control: Those monsters cannot be destroyed until the End Phase. While this card is in your Graveyard: you can Banish this card to make the damage you would take from a battle involving a "Gem" monster 0 until the End Phase.