Djinn Prognosticator of Rituals

[ Fiend / Effect ] When you Ritual Summon a monster, you can banish this card from your GY as 1 of the monsters required for the Ritual Summon. If you Ritual Summon using this card, if that Ritual Summoned monster inflicts battle damage to your opponent, they discard 1 card. ATK/ 400 DEF/ 300