Card Rulings:Grenosaurus

"Grenosaurus":

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OCG Rulings

• The effect of "Grenosaurus" is a Trigger Effect. (It does not target.)
• This effect can optionally be activated at the end of the Damage Step in which "Grenosaurus" destroyed an opponent's monster by battle and sent it to the Graveyard.
• Detaching 1 Xyz Material from this card is the cost to activate this effect.
• This effect cannot be activated if "Grenosaurus" battles a monster with the same ATK and both monsters are destroyed.