Action Card

Action Cards are cards used exclusively in Action Duels, which appear in the Yu-Gi-Oh! ARC-V anime. They are not real cards but are created with the "Solid Vision with Mass" effect as soon as the Dueling Field is created. An Action Duel can only take place if a Field Magic Card that allows the activation of Action Cards is active. When an Action Duel begins, Action Cards are disbursed in a fashion fitting the theme of the active Field Magic, which means the cards can be spread out immediately for the Duelists to find or can be made available at different times via the field's setting. Duelists can search for them during the Duel, and if they find an Action Card they can add it to their hand. Duelists can only hold on to one Action Card at a time. Each player has a time limit during their turn in order to keep them from stalling the Duel in a continuous search for Action Cards.

There are several Action Cards that appear in different fields and are usually used to help save the Duelist from an attack (such as "Evasion" and "Miracle"). However, there are some Action Cards that appear to be specific to the field they appear in, following its theme. Examples include "Twinkle Comet" correlating to "Cosmo Sanctuary", "Extreme Sword" to "Sword's Graveyard", and "High Dive" to "Athletic Circus".

While in the hand, Action Cards can be used to pay for discarding effects, so if a card effect requires multiple discards to activate, a Duelist can quickly find and discard consecutive Action Cards to preserve their hand. Action Cards can be activated from the hand during either player's turn. When a player adds an Action Card to their hand, card effects that activate when a card(s) is added to a player's hand can be used, as seen when Hokuto activated "Cosmo Arrow" in his Duel against Yūya.

Most Action Cards seen so far are Magic Cards. The Action Trap Cards that have appeared so far all activate automatically upon being touched. Since the Action Magic can be played when found, it would seem Action Traps for the opponent would be moot and the Traps are intended for those who pick them up. Not all Action Magic Cards necessarily bring advantages to those who picked them up, as seen with Mad Hurricane, a card that shuffles all cards a player controls back into the Deck. Action Field Magic Cards can also be found and activated during the Duel as seen with "Quiz Frontier - Extra Stage".

Anime
So far, Action Cards are only supported by the Field Magic Cards used for Action Duels.