| Set: | 
          The Infinite Forbidden | 
      
      
          | Card type: | 
          Field Spell | 
      
      
          | Rarity: | 
          Ultra Rare | 
      
        
            "Mimighoul" monsters you control that were not Normal or Special Summoned this turn gain ATK equal to their original DEF. Any player who controls a face-down monster cannot Normal Summon monsters, nor declare an attack with monsters that were Special Summoned this turn. During your Main Phase: You can add 1 "Mimighoul" monster from your Deck or GY to your hand. You can only use this effect of "Mimighoul Dungeon" once per turn.