Number 17: Leviathan Dragon [GENF-EN039] Ghost Rare Dinosaur Set: The Lost Millennium Card

Set: The Lost Millennium Card type: Fusion/Effect Monster Rarity: Ultimate Rare Attack: 2100 Defense: 1200 Elemental Hero Avian' + 'Elemental Hero Burstinatrix' This monster cannot be Special Summoned except by Fusion Summon

destroy this card at the end of the Damage Step

This card can only be Special Summoned from your hand or your Deck by Tributing 1 "Dark Magician" on your side of the field when you succeed in the effect of "Time Wizard"

Set: Return of the Duelist Card type: Xyz/Effect Monster Rarity: Ultra Rare Attack: 2400 Defense: 1500 2 Level 5 monsters Once per turn: You can detach 1 Xyz Material from this card to target 1 face-up monster your opponent controls

After damage calculation

Number 17: Leviathan Dragon [GENF-EN039] Ghost Rare Dinosaur Set: The Lost Millennium CardSet: Generation Force Card type: Xyz Effect Monster Rarity: Ghost 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 Materials, it cannot attack your opponent directly.