Ignition Monster Effects (起動効果, Kidōkōka) are Spell Speed 1 effects that require a manual activation by the card's controller during their own Main Phase 1 or 2 (except "Red-Eyes Wyvern", "Daigusto Eguls", "Alchemic Magician", "Speed Warrior", "Splendid Rose", "General Gantala of the Ice Barrier", "Justice of Prophecy", and "Number 107: Galaxy-Eyes Tachyon Dragon"). This type of effect used to be called a Cost Effect in the early days of Yu-Gi-Oh!, which was slightly confusing because not all of those monsters had a cost.
Examples of monsters with Ignition Effects: "Cyber Gymnast", "XYZ-Dragon Cannon", "Bazoo the Soul-Eater", "Blackwing - Gale the Whirlwind", "3-Hump Lacooda", "Card Trooper", "Dark Simorgh", "Lonefire Blossom", "XX-Saber Faultroll" and most Xyz Monsters.
Previously, the turn player had priority to activate Ignition Effects before an opponent could activate a fast effect. This was removed from the OCG on March 19, 2011, and from the TCG on April 25, 2012.
List of OCG/TCG monsters with Ignition Monster Effects
|Japanese name||Rank||Level||Attribute||Type||Card type||ATK||DEF|
|3-Hump Lacooda||みつこぶラクーダ||3||EARTH||Beast||Effect Monster||500||1,500|
|8-Claws Scorpion||八つ手サソリ||2||DARK||Insect||Effect Monster||300||200|
|A/D Changer||ＡＤチェンジャー||1||LIGHT||Warrior||Effect Monster||100||100|
|Abare Ushioni||暴れ牛鬼||4||EARTH||Beast-Warrior||Effect Monster||1,200||1,200|
|Abyss Soldier||アビス・ソルジャー||4||WATER||Aqua||Effect Monster||1,800||1,300|
|Abyss Warrior||アビス・ウォリアー||4||WATER||Aqua||Effect Monster||1,800||1,300|
|Adreus, Keeper of Armageddon||終焉の守護者アドレウス||5||DARK||Fiend||Xyz Monster||2,600||1,700|
|Airorca||エアジャチ||3||WIND||Sea Serpent||Effect Monster||1,400||300|
|Akz, the Pumer||ピューマン||6||EARTH||Beast-Warrior||Effect Monster||1,500||1,000|
|… further results|