Koitsu [DR1-EN135] Common Gemini Monster you can Tribute Summon 1

you can Tribute Summon 1 monster during your Main Phase this turn

you discard 1 card

when this card destroys an opponent's monster by battle and sends it to the Graveyard: You can Set 1 "Fire Formation" Spell Card directly from your Deck

Set: Dark Revelation Volume 3 Card type: Effect Monster Rarity: Common Attack: 300 Defense: 200 During the End Phase of a turn when this face-up card attacked or was attacked and was destroyed by battle

Koitsu [DR1-EN135] Common Gemini Monster you can Tribute Summon 1Set: 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