Koga's Ditto (10/132) [Gym Challenge Unlimited] BT10-132 they serve a vital function

they serve a vital function in the war effort

Look at your opponent's hand

Set: Dark Revelation Volume 1 Card type: Fusion/Effect Monster Rarity: Ultra Rare Attack: 2800 Defense: 2600 "X-Head Cannon" + "Y-Dragon Head" +"Z-Metal Tank" This card cannot be Special Summoned except by removing from play the above cards on your side of the field then you can Special Summon this card from your Fusion Deck (You do not use 'Polymerization')

select 1 face-up monster on the field

Koga's Ditto (10/132) [Gym Challenge Unlimited] BT10-132 they serve a vital functionSet: Gym Challenge Unlimited Type: Colorless Rarity: Holo Rare Retreat cost: Colorless