Koitsu [DR1-EN135] Common BT4-038 When an attack is declared

When an attack is declared involving this card that was Synchro Summoned this turn and another monster: You can make this card's ATK become double its original ATK until the end of this turn

Set: McDonald's Promo Series 2 Card type: Normal Monster Rarity: Rare Attack: 1150 Defense: 2150 A fiend guarding the treasures of the netherworld

While this card is in the GY

Set: Primal Origin Card type: Xyz/Effect Monster Rarity: Ultimate Rare Attack: 4500 Defense: 3000 3 Level 9 monsters Once per turn: You can detach 1 Xyz Material from this card

•You can target 1 other "True Draco" or "True King" card you control

Koitsu [DR1-EN135] Common BT4-038 When an attack is declaredSet: Dark Revelation Volume 1 Card type: Union Monster Rarity: Common Attack: 200 Defense: 100 Once per turn, during your Main Phase, if you control this card on the field, you can equip it to your 'Aitsu' 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 of the equipped monster by 3000 points. When it attacks with an ATK