Counter Trap Cards (Japanese: カウンター
At least a few Counter Trap Cards are vital in most Decks—without the ability to prevent an opponent's card effect from activating, there is little guarantee of being able to prevail against an opponent, especially if the player has no idea what the opponent's strategy is or what cards they may be playing. Many of the more powerful Counter Traps have a cost or downside to using them so attempting to rely on a very large number of them may result in greatly diminished resources for the player to use.
To make up for the cost in using them, a group of Fairy-Type monsters usually referred to as "Counter Fairies", which reward the player for using Counter Trap Cards, has been released. "Van'Dalgyon the Dark Dragon Lord" is another extremely powerful monster that summons itself and further disadvantages the opponent when a Counter Trap Card is activated.