Edison format ruling
Djinn Prognosticator of Rituals
Card effect (current official text)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.
Rulings
- When you Ritual Summon a Ritual Monster, you can remove from play this card from your GY as 1 of the monsters required for the Ritual Summon.
- When the monster Ritual Summoned using this card inflicts Battle Damage to your opponent, your opponent must select and discard 1 card.If you use this card for the Ritual Summon of "Lycanthrope" and inflict Battle Damage with "Lycanthrope," your opponent discards a card and then the effect of "Lycanthrope" activates.
- The effect to force your opponent to discard does not start a Chain.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.