Rainbow Dark Dragon [PTDN-EN003] Secret Rare Water and "Machina Defender" in your

and "Machina Defender" in your Graveyard

or MonsterCard

you can destroy another face-up "Six Samurai" monster you control instead

Set: Speed Duel GX: Midterm Destruction Card type: Effect Monster Rarity: Secret Rare Attack: 1700 Defense: 1100 Once per turn: You can reveal 1 Fusion Monster from your Extra Deck

you can apply this effect

Rainbow Dark Dragon [PTDN-EN003] Secret Rare Water and "Machina Defender" in yourSet: Phantom Darkness Card type: Effect Monster Rarity: Secret Rare Attack: 4000 Defense: 0 This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by removing from play 7 DARK monsters with different names from your Graveyard. You can remove from play all other DARK monsters you control and from your Graveyard to have this card gain 500 ATK for each card removed.