Subterror Behemoth Ultramafus [INOV-EN084] Ultra RareSet: Invasion: Vengeance Card type: Flip Effect Monster Rarity: Ultra Rare Attack: 3000 Defense: 1800 FLIP: You can change all other face up monsters on the field to face down Defense Position. You can only use this effect of "Subterror Behemoth Ultramafus" once per turn. When a face up monster you control is flipped face down, if you control no face up monsters: You can Special Summon this card from your hand in Defense Position. Once per turn: You