Paladin of Dark Dragon (Blue) (DLCS-EN069) - Dragons of Legend: The Complete Series 1st Edition

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, except "Red-Eyes B. Chick". You can only use this effect of "Paladin of Dark Dragon" once per turn.