Dragonair (4/20) [Black & White: Dragon Vault] Secrets of Eternity While you control another "Number"

While you control another "Number" Xyz Monster

Set: Gold Series 3 Card type: Effect Monster Rarity: Gold Rare Attack: 1300 Defense: 200 Once per turn

You can only use each effect of "Guardian Slime" once per turn

Set: Dark Revelation Volume 4 Card type: Effect Monster Rarity: Rare Attack: 1500 Defense: 1000 Effect: The card is unaffected by the effects of Trap Cards

or Left Leg of the Forbidden One is not in your Graveyard

Dragonair (4/20) [Black & White: Dragon Vault] Secrets of Eternity While you control another "Number"Set: Black & White: Dragon Vault Type: Dragon Rarity: Holo Rare Retreat cost: Colorless,Colorless