Cannot be destroyed by battle or card effects while your opponent controls any face-down monsters or you control a Mimighoul monster other than Mimighoul Master . You can only use each of the following effects of Mimighoul Master once per turn. If this card is Normal or Special Summoned: You can add 1 Mimighoul monster from your Deck to your hand, except Mimighoul Master . During your opponent s Main Phase (Quick Effect): You can change 1 face-down monster on the field to face-up Attack or Defense Position.