A Quick Effect (Japanese: 誘発即時効果 Yūhatsu Sokuji Kōka), formerly known as a Multi-Trigger Effect, is a type of monster effect that is Spell Speed 2 (and is the only type of Spell Speed 2 monster effect).
It is the only type of monster effect that can be activated in Summon negation window, and the only one that can be Chained to another activation (excluding SEGOC). As such, monsters effects that negate activations or Summons are all Quick Effects.
Under the Problem-Solving Card Text, Quick Effects are normally noted by "During either player's/your opponent's [turn/Phase/Step]:". Some Quick Effects are specifically noted as such in the card text, such as "Necro Gardna". For cards without Problem-Solving Card Text, Quick Effects are denoted by text which indicates the same timing as the PSCT standard, or only noted in rulings.
Unless otherwise specified (e.g. "Light and Darkness Dragon"), Quick Effects may be activated as many times in a Chain as possible.
- Chain Link 1: The opponent activates "Fissure".
- Chain Link 2: The player Chains "Horus the Black Flame Dragon LV8"'s effect to negate "Fissure".
- Chain Link 3: The opponent Chains "Book of Moon", targeting "Horus".
- Chain Link 4: The player Chains "Horus the Black Flame Dragon LV8"'s effect to negate "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.
List of OCG/TCG monsters with Quick Monster Effects
|Japanese name||Rank||Level||Attribute||Type||Card type||ATK||DEF||?ATK||?DEF|
|A-Team: Trap Disposal Unit||トラップ処理班 Ａチーム||2||FIRE||Machine||Effect Monster||300||400|
|Absolute King Back Jack||絶対王 バック・ジャック||1||DARK||Fiend||Effect Monster||0||0|
|Abyss Dweller||深淵に潜む者||4||WATER||Sea Serpent||Xyz Monster||1,700||1,400|
|Accel Synchron||アクセル・シンクロン||5||DARK||Machine||Synchro Monster||500||2,100|
|Achacha Chanbara||アチャチャチャンバラー||3||FIRE||Warrior||Effect Monster||1,400||400|
|Ally of Justice Cycle Reader||Ａ・Ｏ・Ｊ サイクルリーダー||3||DARK||Machine||Effect Monster||1,000||1,000|
|Amazoness Scouts||アマゾネス・スカウト||2||EARTH||Warrior||Effect Monster||500||1,100|
|Anti-Hope, God of Despair||絶望神アンチホープ||12||DARK||Fiend||Effect Monster||5,000||5,000|
|Arcana Force EX - The Light Ruler||アルカナフォースＥＸ－ＴＨＥ ＬＩＧＨＴ ＲＵＬＥＲ||10||LIGHT||Fairy||Effect Monster||4,000||4,000|
|… further results|