You can Ritual Summon this card with "Armor Dragon Ritual". At the start of the Damage Step, if this card battles a monster that was Special Summoned from the Extra Deck: You can shuffle that monster into the Deck. You can Tribute this card; Special Summon 1 Level 5 or higher WIND Dragon monster from your hand or Deck. You can only use each effect of "Knight of Armor Dragon" once per turn.