Single Strike Style Mustard (177/163) [Sword & Shield: Battle Styles] XY44 if the negated effect can

if the negated effect can be activated

or (if Monster) cannot activate its effects

when an opponent's monster declares an attack: You can change 1 face-down Defense Position "Subterror" monster you control to face-up Attack or Defense Position

Set: Phantom Darkness Card type: Effect Monster Rarity: Secret Rare Attack: 1700 Defense: 2200 When this card is Normal Summoned

Check your opponent's hand and all cards in their hand with the same name as the destroyed card are sent to the Graveyard

Single Strike Style Mustard (177/163) [Sword & Shield: Battle Styles] XY44 if the negated effect canSet: Sword & Shield: Battle Styles Type: Supporter Rarity: Secret Rare