Quick Effect (誘発即時効果, Yūhatsu Sokuji Kōka; previously known as Multi-Trigger Effect in the TCG) is the only Monster Effect that are Spell Speed 2. It is any monster effect that could be activated during Summon negation window, or could be chained "in response" to another activation.

Monsters effects that negate the activations or the Summons are all Quick Effects. Monsters that have other Quick Effects usually have: "This effect can be activated during either player's turn", or something similar in its card text. The card rulings may also indicate if the effect it has is a Quick Effect or not.

Following the Problem-Solving Card Text, any effect that has "During either player's/your opponent's turn:" or similar text, is a Quick Effect. Some monsters like "Swift Scarecrow" may indicates in its text that the effect is a Quick Effect.

Most Quick Effects can be activated more than once in a chain, while some others cannot, such as "Light and Darkness Dragon", because such specific cards have rulings stating that they can only activate once per chain.

• Example #1: "Horus the Black Flame Dragon LV8" exists on the field, your opponent activates "Fissure" as Chain Link 1. "Horus the Black Flame Dragon LV8"'s optional effect activates as Chain Link 2, trying to negate "Fissure". Your opponent replies by chaining "Book of Moon" as Chain Link 3, targeting Horus. Then, you can activate the effect of "Horus the Black Flame Dragon LV8" as Chain Link 4, negating "Book of Moon.

Since chains resolve backwards, the chain would resolve as follows:

• Chain Link 4: "Horus the Black Flame Dragon LV8" Negates "Book of Moon".
• Chain Link 3: "Book of Moon" Resolves without effect.
• Chain Link 2: "Horus the Black Flame Dragon LV8" Negates "Fissure".
• Chain Link 1: "Fissure" Resolves without effect.

• Example #2: "Light and Darkness Dragon" exists on the field and your opponent activates "Fissure" as Chain Link 1. "Light and Darkness Dragon"'s effect activates as Chain Link 2 to "Fissure". Your opponent replies by chaining "Book of Moon" as Chain Link 3, but because "Light and Darkness Dragon" has a ruling stating that it cannot be used more than once in a chain, it cannot negate "Book of Moon"'s activation.

In this scenario, the following would happen:

• Chain Link 3: "Book of Moon" resolves, flipping "Light and Darkness Dragon" into face-down defense position.
• Chain Link 2: "Light and Darkness Dragon" Negates "Fissure".
• Chain Link 1: "Fissure" Resolves without effect.

NOTE: "Light and Darkness Dragon" Negates "Fissure" even though it is flipped face-down, since "Light and Darkness Dragon"'s effect does not require "Light and Darkness Dragon" to be face up on the field for it to resolve.

NOTE: There was some confusion in this article regarding "Trigger Quick Effects" and "Multi Trigger Quick Effects". Incorrect information stated that "Light and Darkness Dragon"'s effect was considered a Trigger Quick effect, and therefore could not be activated multiple times in a chain. There is no such thing as a Trigger Quick Effect, and the term "Multi Trigger Quick Effect" is not currently used anymore. Multi Trigger effects have since been renamed to "Quick Effects". The only reason "Light and Darkness Dragon" cannot be activated multiple times in a chain is because Konami has ruled so. Their reason for this is to prevent "Light and Darkness Dragon" from negating his own effect over and over in the same chain.

see List of Quick Effect Monster Cards

ExampleEdit

List of OCG/TCG monsters with Quick Monster EffectsEdit