You can detach 1 material from this card; add 1 "K9" card from your Deck to your hand, then, if your opponent activated a monster effect this turn, you can Set 1 "K9" Quick-Play Spell from your Deck or GY. When your opponent activates a monster effect in the hand or GY (Quick Effect): You can detach 1 material from this card; negate that effect. You can only use each effect of "K9 - #17 "Ripper"" once per turn.
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