Mimighoul Dungeon

All "Mimighoul" monsters you control that were not Normal or Special Summoned this turn gain ATK equal to their original DEF. If a player controls a face-down monster, they cannot Normal Summon, nor can they declare an attack with monsters the turn they are Special Summoned. 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.