Card Rulings:Gorgonic Guardian

OCG Rulings

 * The "that monster's ATK becomes 0, also its effects are negated." effect is a Quick Effect. (This effect targets 1 face-up monster your opponent controls.)


 * Detaching 1 Xyz Material from this card is a cost to activate the "that monster's ATK becomes 0, also its effects are negated." effect.


 * The "that monster's ATK becomes 0, also its effects are negated." effect can also be activated during the Damage Step, but not during damage calculation.


 * The "You can target 1 monster with 0 ATK on the field; destroy that target." effect is an Ignition Effect. (This effect targets 1 monster on the field.)