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Kelbek
A monster that attacks this card returns to the hand. Damage calculation is applied normally.

Keldo
When this card is destroyed and sent to the Graveyard as a result of battle, select 2 cards from your opponent's Graveyard, add them to your opponent's Deck and the Deck is then shuffled.

Killer Needle
A huge bee with exceptional strength that's particularly dangerous in a swarm.

King Dragun
"Lord of D." + "Divine Dragon Ragnarok" Your opponent cannot target Dragon monsters with card effects. Once per turn: You can Special Summon 1 Dragon monster from your hand.

King Fog
A fiend that dwells in a blinding curtain of smoke.

King of the Skull Servants
The original ATK of this card is the combined number of "King of the Skull Servants" and "Skull Servant" in your GY x 1000. When this card is destroyed by battle and sent to the GY: You can banish 1 other "King of the Skull Servants" or 1 "Skull Servant" from your GY; Special Summon this card.

King of the Swamp
This card can be used as a substitute for any 1 Fusion Material whose name is specifically listed on the Fusion Monster Card, but the other Fusion Material(s) must be correct. You can discard this card to the Graveyard; add 1 "Polymerization" from your Deck to your hand.

King of Yamimakai
Wields the power of darkness to destroy its enemies.

King Tiger Wanghu
When a monster(s) with 1400 or less ATK is Normal Summoned or Special Summoned: Destroy those monsters with 1400 or less ATK. This card must be face-up on the field to activate and to resolve this effect.

Kiryu
Once per turn, during your Main Phase, if you control this card on the field, you can equip it to your "Dark Blade" as an Equip Spell Card, OR unequip the Union equipment and Special Summon this card in face-up Attack Position. While equipped to a monster by this card's effect, increase the ATK/DEF of the equipped monster by 900 points, and you can Tribute this card to allow the equipped monster to attack your opponent's Life Points directly this turn. (1 monster can only be equipped with 1 Union Monster at a time. If the equipped monster is destroyed as a result of battle, destroy this card instead.)