Blood Mefist [YCSW-EN004] Ultra Rare Secret Rare if you activated this effect

if you activated this effect while you did not control "Infernoble Knight Emperor Charles"

You can only use this effect of "Orcust Harp Horror" once per turn

(Quick Effect): You can Tribute this card

Set: The Lost Art Promotion Card type: Ritual/Effect Monster Rarity: Ultra Rare Attack: 1600 Defense: 1000 You can Ritual Summon this card with "Machine Angel Ritual"

Blood Mefist [YCSW-EN004] Ultra Rare Secret Rare if you activated this effectSet: Yu Gi Oh! Championship Series Prize Cards Card type: Synchro Effect Monster Rarity: Ultra Rare Attack: 2800 Defense: 1300 1 Tuner + 1 or more non Tuner monsters Once per turn, during your opponent's Standby Phase: You can inflict 300 damage to your opponent for each card your opponent controls. Each time your opponent Sets a Spell or Trap Card(s): Inflict 300 damage to your opponent.