Jackknife

"Jackknife" (ジャックナイフ Jakkunaifu) are a series of cards with "Jackknife" in its card name, they are currently unique to Dragon World.

List of Sets containing "Jackknife" Cards

 * Booster Set 1: Dragon Chief
 * Character Pack 1: Burning Valor
 * Promo Cards
 * Trial Deck 3: Dragonic Force
 * Booster Set 3: Drum's Adventures
 * Extra Booster 2: Great Clash!! Dragon VS Danger
 * Booster Set 4: Darkness Fable

Items

 * Jackknife "Goldritter"

Spells

 * Jackknife Braveheart
 * Jackknife Gift

Size 2

 * Jackknife "Aggressor"
 * Jackknife "Beistand"
 * Jackknife "Berserker"
 * Jackknife "Burn Energy"
 * Jackknife "Dispersal"
 * Jackknife "Jaeger"
 * Jackknife "Savior"
 * Jackknife "Thunder Storm"
 * Jackknife Dragon

Size 3

 * Jackknife "10000"

Trivia

 * This series is named for the Jackknife, referencing Jackknife Dragon's ability to act as several monsters in one.