This monster can only be Ritual Summoned with the Ritual Spell Card, White Dragon Ritual. You must also Tribute monsters whose total Levels equal 4 or more from the field or your hand. When this monster attacks a face-down Defense Position monster, destroy the face-down monster with this card''s effect. You can Tribute this card to Special Summon 1 Blue-Eyes White Dragon from your hand or your Deck. (Blue-Eyes White Dragon cannot attack during that turn.)