"A Case for K9" 
20
Continuous SpellWhen this card is activated: You can add 1 "K9" monster from your Deck to your hand. "K9" monsters you control gain 900 ATK during any turn in which your opponent has activated a monster effect in the hand or GY. If this card in the Spell & Trap Zone is destroyed by card effect: You can Set 1 "K9" Quick-Play Spell from your Deck or GY. You can only use this effect of ""A Case for K9"" once per turn. You can only activate 1 ""A Case for K9"" per turn.
K9-04 Noroi 15
Level 5 EARTH/Machine Effect2200 ATK / 1500 DEF
If your opponent has 2 or more cards in their hand, you can Normal Summon this card without Tributing. You can only use each of the following effects of "K9-04 Noroi" once per turn. If this card is Normal Summoned: You can Special Summon 1 non-Machine "K9" monster from your Deck, but you cannot Special Summon from the Extra Deck, except "K9" monsters, while you control that face-up monster. You can send 1 face-up "K9" card you control to the GY; look at your opponent's hand.
K9-17 "Ripper" 30
Level 5 WIND/Warrior Xyz Effect2300 ATK / 1800 DEF
2 Level 5 monsters
You can detach 1 material from this card; add 1 "K9" card from your Deck to your hand, then if your opponent has 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.
K9-17 Izuna 20
Level 5 EARTH/Warrior Effect2100 ATK / 1600 DEF
If your opponent has 2 or more cards in their hand, you can Normal Summon this card without Tributing. You can only use each of the following effects of "K9-17 Izuna" once per turn. During the Main Phase, if your opponent has activated a monster effect in the hand or GY this turn (Quick Effect): You can Special Summon this card from your hand. If this card is Normal or Special Summoned: You can send 1 "K9" card from your Deck to the GY, except "K9-17 Izuna".
K9-66a Jokul 33
Level 5 DARK/Aqua Effect2000 ATK / 1900 DEF
If your opponent has 2 or more cards in their hand, you can Normal Summon this card without Tributing. You can only use each of the following effects of "K9-66a Jokul" once per turn. You can reveal this card and 1 other Level 5 monster in your hand; Special Summon both, but they cannot be used as material for the Xyz Summon of a LIGHT monster. During your Main Phase: You can add 1 non-Aqua "K9" monster from your Deck to your hand.
K9-66b Lantern
Level 5 DARK/Pyro Effect2000 ATK / 1900 DEF
If your opponent has 2 or more cards in their hand, you can Normal Summon this card without Tributing. You can only use each of the following effects of "K9-66b Lantern" once per turn. If this card is in your hand: You can target 1 Level 5 non-Pyro "K9" monster in your GY; Special Summon both it and this card, but they cannot be used as material for the Xyz Summon of a LIGHT monster. During your Main Phase: You can add 1 "K9" Spell/Trap from your Deck to your hand.
K9-66X "Jacks"
Level 5 DARK/Fiend Xyz Effect2600 ATK / 2500 DEF
2 Level 5 monsters
If this card is Xyz Summoned, or if your opponent activates a monster effect in the hand or GY: You can detach 1 material from this card, then target 1 monster on the field; destroy it. You can only use this effect of "K9-66X "Jacks"" once per turn. A "K9" Xyz Monster that has this card as material gains this effect.
● During any turn in which your opponent has activated a monster effect in the hand or GY, any battle damage this card inflicts to your opponent is doubled.
K9-EW Special Release Experiment
Normal TrapSpecial Summon 1 "K9" monster from your hand or GY, then you can Special Summon 1 "K9" Xyz Monster from your Extra Deck, by using that monster as material (this is treated as an Xyz Summon), but destroy the monster Special Summoned from the Extra Deck, during the End Phase of the next turn. During the End Phase: You can banish this card from your GY, then target 1 "K9" Quick-Play Spell in your GY; Set it. You can only use each effect of "K9-EW Special Release Experiment" once per turn.
K9-LC Release Restraint
Quick-Play SpellTarget 1 "K9" Xyz Monster or 1 Rank 5 Xyz Monster you control; Special Summon from your Extra Deck, 1 "K9" Xyz Monster with a different name, by using that monster you control (this is treated as an Xyz Summon, transfer its materials to the Summoned monster). At the end of the Battle Phase, if your "K9" monster battled this turn: You can Set this card from your GY. You can only use each effect of "K9-LC Release Restraint" once per turn.
K9-ØØ "Hound"
Level 5 LIGHT/Beast-Warrior Xyz Effect2500 ATK / 2500 DEF
2 Level 5 monsters
Cannot be destroyed by battle or your opponent's card effects the turn it is Special Summoned. Each time your opponent activates a monster effect, this card gains 500 ATK when that effect resolves. Once per turn, during the Standby Phase: You can detach 1 material from this card, then target 1 card on the field; banish it.
K9-ØØ Lupis 5
Level 5 EARTH/Beast-Warrior Effect2300 ATK / 200 DEF
An Xyz Monster that has this card as material gains this effect.
● Your opponent cannot target this card with card effects.
You can only use each of the following effects of "K9-ØØ Lupis" once per turn. During the Main Phase, if your opponent has activated a monster effect in the hand or GY this turn (Quick Effect): You can Special Summon this card from your hand or GY, but banish it when it leaves the field. During your opponent's turn, you can (Quick Effect): Immediately after this effect resolves, Xyz Summon using this card you control.
K9-X "Ripper/M" 10
Level 9 WIND/Beast Xyz Effect3100 ATK / 2600 DEF
2 Level 9 monsters
If this card attacks a Defense Position monster, inflict piercing battle damage to your opponent. You can only use each of the following effects of "K9-X "Ripper/M"" once per turn. If this card is Special Summoned by a "K9" Spell/Trap effect: You can target up to 2 cards in your opponent's GY and/or banishment; shuffle them into the Deck. When your opponent activates a monster effect (Quick Effect): You can detach 2 materials from this card; negate that effect, then destroy all cards on the field.
K9-X "Werewolf" 10
Level 9 LIGHT/Beast-Warrior Xyz Effect3300 ATK / 2500 DEF
2 Level 9 monsters
While this card has material, it can attack a number of times each Battle Phase, up to the number of materials attached to it. When your opponent activates a card or effect (Quick Effect): You can detach 1 material from this card, then activate this effect depending on whose turn it is;
● Yours: Banish up to 1 card each from your opponent's field and GY.
● Opponent's: Look at your opponent's hand and banish 1 card from it face-up, until the End Phase.
You can only use this effect of "K9-X "Werewolf"" once per turn.
K9-X Forced Release
Quick-Play SpellDuring the Main Phase: Target 1 "K9" Xyz Monster you control; Special Summon from your Extra Deck, 1 "K9" Xyz Monster with a different name, by using that monster you control (this is treated as an Xyz Summon, transfer its materials to the Summoned monster), then you can destroy 1 card your opponent controls. At the end of the Battle Phase, if your "K9" monster battled this turn: You can Set this card from your GY. You can only use each effect of "K9-X Forced Release" once per turn.