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.