إكسوديا نيكروس

Cannot be Normal Summoned/Set. Must be Special Summoned with "Contract with Exodia", and cannot be Special Summoned by other ways. Cannot be destroyed by battle or Spell/Trap effect. Once per turn, during your Standby Phase: This card gains 500 ATK. Destroy this card unless all 5 of these cards are in your Graveyard - "Exodia the Forbidden One", "Right Arm of the Forbidden One", "Left Arm of the Forbidden One", "Right Leg of the Forbidden One" and "Left Leg of the Forbidden One".