You can't move; you can't attack; you can't even retire. All you can do is just float there.

Suiko Tatsunagi, Episode 130


Star-vader, Chaos Breaker Dragon

"Lock" (呪縛ロック Rokku) is a keyword, which refers to the action to change the state of a rear-guard to be a locked card, and introduced in Trial Deck 11: Star-vader Invasion.

In the anime, Lock is visually shown as two black rings collapsing onto the unit reverting it into card form and on the table, the face down card is shown to emit sparks when the player attempts to touch it, and at the end of the turn, all cards that were affected return to be face up automatically without making a turn.

In Cardfight!! Vanguard G, Lock is shown as a red sphere engulfing the locked unit on the field. However, the Star-vaders' variation continue with two orbiting black rings around the lock.

Despite this mechanic being relatively unique (as the only cards to use it outside of Link Joker are the Яeverse units), as well as requiring reminder text when it was first introduced, "Lock" itself is not considered to be Link Joker's keyword by Cardfight!! Vanguard G's definition.

How it Works

When a rear-guard is locked, it turns face down and remains face down on the circle it was locked on until the end of its owner's turn. A locked card loses all characteristics present on its face-up side, as well as other characteristics that it received before being locked. A locked card is not a rear-guard (and hence it is not a unit either, although it is still regarded as a card, specifically a "locked card"), and while it is locked, the circle where it is on is not regarded as a rear-guard circle, but as a "locked circle". A locked card has no standing or resting state by game mechanic, but physically, the player is free to choose the orientation to place their locked cards (being vertically the most common).

Since a locked card is not a unit, it cannot be used to perform any action; it cannot attack, boost, intercept, use abilities, be used to pay costs, be moved to another circle or zone, or be retired by calling another unit over it. A locked can only be used by effects that explicitly affect a locked card or any cards in general. Including the locked circle, it can only used by effects that explicitly say "locked circle" or any "circle" in general.


When a locked card will be turned face up, the action is known as "unlock" (解呪アンロック Anrokku). It means "turn the locked card face up in [Stand] state", which normally occurs at the beginning of the owner's end phase after it was locked. A locked card that is unlocked returns to being a rear-guard in the circle where it is located. However, the unlocked card is considered to be a different card than the original, and therefore, all effects that received card before it was locked disappear (For example, if the unit had to leave the field at the end of turn, this does not happen since it was locked). Also, the unlocked card is not considered as being placed on the circle, and so "placed on" effects are not activated.

Starting from Booster Set 14: Brilliant Strike, there are cards that can unlock with their effects, most notably Salvation Lion, Grand Ezel Scissors, who can unlock all of your locked cards with his Limit Break. This allows units to nullify the opponent's locking efforts or force them to relock units. G Trial Deck 5: Fateful Star Messiah introduced the first cards whose effects are activated when they are unlocked.

Omega Lock

"Omega Lock" (Ωオメガ呪縛ロック Omega Rokku) is a special variation of lock introduced in Booster Set 15: Infinite Rebirth.

When a locked card is affected by Omega Lock, during the owner's next turn, on his/her end phase, they cannot unlock that card. Said locked card will only be unlocked during the owner's next end phase after it is affected. However, locked cards affected by Omega Lock still can be unlocked normally or with effects during any phase in any turn, excluding the "next end phase" where they cannot be unlocked by anything. If a locked card is affected by Omega Lock multiple times in the same turn, it will not prolong the Omega Lock's duration of two turns. In the card text, Omega Lock is referred as "cannot be unlocked during the next end phase".

In the anime, Omega Lock is depicted as "locking the locked card".

Frequently Asked Questions

  1. Question: If I have Liberator of the Round Table, Alfred as my vanguard and 1 of my 5 rear-guards has been locked, will my vanguard's power be 19000 or 21000 due to his Limit Break?
    Answer: 19000. Your locked cards do not exist as rear-guards on the field anymore.
  2. Question: If my vanguard is Dragonic Overlord and my only rear-guard is an Embodiment of Armor, Bahr which will be locked, will my Dragonic Overlord gets [Power]-2000?
    Answer: Yes. It will be treated as though you have no rear-guards, meaning Dragonic Overlord will get power-2000.

List of Cards

Can Lock

Angel Feather

Aqua Force

Dark Irregulars

Dimension Police


Great Nature


Link Joker



Neo Nectar

Nova Grappler

Pale Moon

Royal Paladin

Can Omega Lock

Link Joker

Can Unlock

Cray Elemental


Gold Paladin


Link Joker



Royal Paladin

Can Put Cards as Locked

Link Joker


  • The kanji used for lock "呪縛" (Jubaku) can be translated as "Curse" or "Spell".
  • The kanji used for unlock "解呪" (Kaiju) can be translated as "Dispel" or "Disenchant".



  • A unit is encircled by two black rings...
  • ...engulfed in a bright light...
  • ...reduced to a card...
  • ...and being locked by two rings.
  • The unit is locked in a red/black sphere.

Normal Unlock

  • A card turned face down by lock...
  • ...unlocks at the end of turn.

Unlocking by Effects

  • The lock is cut...
  • ...the black ring is destroyed...
  • ...and the unit is unlocked.

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