Ravenous Vendread (POTE-EN064) - Power of the Elements 1st Edition

Special Summon 1 "Vendread" monster from your hand, Deck, or GY in face-down Defense Position, except "Vendread Scarvenger", then apply the following effect.
• Ritual Summon any 1 "Vendread" Ritual Monster from your hand or GY by Tributing monsters you control, including the monster Special Summoned by this card, whose total Levels equal or exceed the Level of the Ritual Monster. You can only activate 1 "Ravenous Vendread" per turn.