Subterror Behemoth Ultramafus is a Ultra Rare Flip Effect Monster card from Yu-Gi-Oh! (Invasion: Vengeance, INOV). Current market price: $1.57.
Ultra Rare
Invasion: Vengeance (INOV)
Card Text
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 can change this card to face-down Defense Position.
