Paladin of Dark Dragon (Purple) [DLCS-EN069] Ultra Rare

You can Ritual Summon this card with "Dark Dragon Ritual". At the start of the Damage Step, if this card attacks a Defense Position monster: Destroy that monster. You can Tribute this card; Special Summon 1 "Red-Eyes" monster from your hand or Deck. You can only use this effect of "Paladin of Dark Dragon" once per turn.