Why is Makyura the Destructor banned?

Answer 1

Makyura the Destructor

DARK/Warrior/Effect/4

ATK/1600 DEF/1200

During the turn this card is sent to the Graveyard, the owner of this card can activate Trap Card(s) from his/her hand.

Call of the Haunted

TRAP/Continuous

Select 1 monster from your Graveyard and Special Summon it in face-up Attack Position. When this card is removed from the field, destroy the monster. When that monster is destroyed, destroy this card.

Dark Scorpion - Chick the Yellow

DARK/Warrior/Effect/3

ATK/1000 DEF/1000

When this card inflicts Battle Damage to your opponent's Life Points, you can select and activate 1 of the following effects:

• Return 1 card on the field to its owner's hand.
• Pick up 1 card on the top of your opponent's Deck (Your opponent does not look at the card). Select the top or the bottom of the Deck and return the card there.

Makyura the Destructor was used to play a One-Turn Kill strategy composed of itself, Dark Scorpion - Chick the Yellow, and Call of the Haunted. A player would send both Dark Scorpion - Chick the Yellow, and Makyura the Destructor to the Graveyard. Then, via Makyura the Destructor's effect, the player would play Call of the Haunted from their hand, Special Summoning Dark Scorpion - Chick the Yellow from the Graveyard and would attack the other player directly. This would trigger Dark Scorpion - Chick the Yellow's effect and the player would return Call of the Haunted to their hand, destroying Dark Scorpion - Chick the Yellow in the process. Then, since Makyura the Destructor's effect was still applied, they would activate Call of the Haunted from their hand and select Dark Scorpion - Chick the Yellow again. They would repeat this process until the opponent had no more Life Points.