Kozaky [AST-058] Common Booster Boxes the ATK/DEF of all face-up

the ATK/DEF of all face-up monsters your opponent controls become half their current ATK/DEF (even if this card leaves the field)

When this card destroys a monster by battle and sends it to the Graveyard: You can destroy 1 monster your opponent controls

Select 1 card among them and return it to his/her Deck

This card can only be Special Summoned

Kozaky [AST-058] Common Booster Boxes the ATK/DEF of all face-upSet: Ancient Sanctuary Card type: Normal Monster Rarity: Common Attack: 400 Defense: 400 A workaholic fiend who devotes everything to his research into the languages of Dark World. His mind has collapsed because of working too hard.