Number 17: Leviathan Dragon [GENF-EN039] Ultimate Rare 40 and have either Uria

and have either Uria

Set: Duelist League Promo Card type: Synchro/Effect Monster Rarity: Rare Attack: 2800 Defense: 1000 1 Tuner + 1 or more non-Tuner monsters

the King of Poisonous Snakes"

or as a target of a Spell or Trap Card

Once per turn: You can target 1 face-up monster on each player's field

Number 17: Leviathan Dragon [GENF-EN039] Ultimate Rare 40 and have either UriaSet: Generation Force Card type: Xyz Effect Monster Rarity: Ultimate Rare Attack: 2000 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.