There are two main reasons why cards are banned in terms of K Society, 1 is that the strength of the card is too strong, and 2 is related to FTK tactics. The most common idea of FTK tactics is the infinite circulation of resources, which is what we often call the LOOP system. As long as you achieve LOOP, you can continue to manufacture unlimited resources, and finally crush the opposite side with the resource difference. The most classic LOOP system in the history of Game King is undoubtedly the magic cycle system of "Iron Knight" + "Butterfly Shortsword - Echo".
Many people may not understand why such a mediocre card will still occupy a card slot in the forbidden card table in this era of god cards flying all over the sky. The time when the Butterfly Short Sword was banned was in March 2005, which means that no one has used this card for more than ten years, and it is no wonder that everyone does not know what kind of bloody storm this card has stirred up in the history of the game king.
The reason why the Butterfly Shortsword was banned was the amazing effect of pairing it with "Iron Knight Chia Fried". The Iron Knight's effect is to destroy an equipment card when it is equipped with it. The effect of the Butterfly Shortsword is that when the card is destroyed, it bounces back into the hand. Equipping the Butterfly Shortsword to the Iron Knight allows for an infinite loop of "Unleash Magic - Destroy Magic - Bounce Back Hand - Continue Magic".
This LOOP can be combined with the "Wang Li Magic Library" to achieve unlimited draws, achieving special victories for the Dark Grand Mage. Every time the Butterfly Shortsword is launched, you can place a magic indicator for the Wang Li Library, and the 2 effects draw of the Wang Li Library have no restrictions on the use, that is to say, "Iron Knight" + "Butterfly Short Sword - Echo" + "Wang Li Magic Library" can be achieved in the first round to draw out the deck and gather the Dark Grand Mage to win the victory easily.
In addition, this LOOP with "magic absorption" can achieve unlimited blood return, as a substitute of "morale" although can not achieve unlimited blood, but its trigger blood return effect, can still cooperate with the "Explosive Girl" to achieve a permanent unlimited blood burning FTK.
Basically, in the deck that requires a mana indicator, the two cards "Iron Knight" + "Butterfly Shortsword - Echo" can provide a magic indicator with no upper limit, making the use of cards that need to consume mana indicators unrestrained. For example, with the "Magic Guide Beast Kerberos", it can increase the attack power infinitely. Paired with "Magic Manipulator Dolls", it not only adds attack power, but also has the effect of infinite explosion.
Later, with the emergence of the "Storm Magician", this system was even more impossible to come back. By pairing it with "Enchanted City Endemion", "Wang Li Library", "Magic Guide Beast Kerberos", "Magic Manipulator Doll", which can store mana indicators as long as they are activated, "Storm Magician" can easily consume 16 mana indexes on the field and deduct 8000HP on the opposite side to complete FTK.
Incidentally, the Storm Magician was also imprisoned in the Small Black Room by the moldy head of the K Society's suppression of FTk's tactics. Storm Magicians who only involved one FTK style of play entered the Little Black House, and the Butterfly Shortsword and the Iron Knight's LOOP, as the cornerstones of many FTKs, were naturally imprisoned in the Little Black House by the K Society. Although the Iron Knight is also the basis of the system, it is not as uncontrollable as the Butterfly Short Sword, and in addition to the Iron Knight, there is also the "Silent Staff - Ripple" that can be used as a substitute.
"Butterfly Short Sword - Echo" also has a similar effect of "Excalibur - Phoenix Sword" as an alternative, and later there are also pokers to develop the Phoenix Sword dimension Su Sheng's LOOP system, the result is that even "Excalibur - Phoenix Sword" also joined the big family of forbidden card tables, and it still belongs to the kind of prison seating.
So the "Butterfly Shortsword - Echo" is really deserved to be listed as a banned card.