A Charm (チャーム Chaamu) is a game object that can primarily be manipulated by black cards. Charms first appeared in WX-04 Infected Selector.

Cards can be placed under your SIGNI face down as a Charm when certain effects are used or triggered, such as the [Auto] ability of Ariton, Fallen Annihilation. Charms can be used as a resource for the payment of ability costs, such as the abilities of Ulith, Enma of Suffering, and certain SIGNI gain benefits if they have a Charm attached to them, such as Maymon, Fallen Confession.

A SIGNI can only have one Charm under it at any time. Effects that would otherwise place a Charm under a SIGNI that already has a Charm under it will not place a Charm under that SIGNI.

Charms may not be removed except by a card's effect, or if the Charmed SIGNI leaves the field. When a SIGNI with a Charm attached to it leaves the field, the Charm is placed into the trash.

The card that becomes a Charm has no properties except being a Charm. Neither player may see what the Charm card exactly is (i.e. its name, and any distinguishing properties).

Any ability that attaches a Charm to a SIGNI does not directly affect that SIGNI. You may place a Charm under a SIGNI that is unaffected by your card effects, as long as there is no Charm under that SIGNI.

The current reminder text for Charm is:

[Charm] (Each SIGNI can have up to one Charm card, and it is placed face-down under the SIGNI)
Colors White WhiteRed RedBlue BlueGreen GreenBlack BlackColorless Colorless
Card Types LRIGARTSSIGNISpellResonaKeyCraft
Game Zones Check ZoneDeckEner ZoneField (SIGNI Zone, LRIG Zone)
HandLife ClothLRIG DeckLRIG TrashTrash
Game Mechanics AbilityAttackBanishCoinCostCrushDamageDiscardDrawExclude
Ener ChargeExceedFreezeGrowLife BurstUp/DownRefreshRemove
Keywords AccessoryAssassinBetChainCharmCross (Heaven) ● Double CrushEncoreGuard
LancerLayerMulti EnerRide (Drive) ● RiseShadowS LancerTrapTriple CrushVirus
Miscellaneous FAQsFormats (Key SelectionAll-Star) ● Mayu's RoomRule processingTrigger ability