Number 17: Leviathan Dragon (Blue) [DL15-EN012] Rare Duelist Pack Special Edition then Special Summon this card

then Special Summon this card (from your hand or GY)

but the Special Summoned monster cannot attack directly

You can only Special Summon "Archfiend Commander" once per turn this way

Set: Speed Duel Decks: Destiny Masters Card type: Normal Spell Rarity: Common Tribute 1 monster

Number 17: Leviathan Dragon (Blue) [DL15-EN012] Rare Duelist Pack Special Edition then Special Summon this cardSet: Duelist League Promo Card type: Xyz Effect Monster Rarity: Rare Attack: 2000 Defense: 0 2 Level 3 monsters Once per turn: You can detach 1 Xyz Material from this card; this card gains 500 ATK. If this card has no Xyz Material, it cannot attack your opponent directly.