Effect
2 Level 7 Spellcaster-Type monsters Once per turn: You can detach 1 Xyz Material from this card; destroy Spell/Trap Card(s) your opponent controls, up to the number of "Spellbook" Spell Cards in your Graveyard.
The monster effect of "High Priestess of Prophecy" is an Ignition Effect.
This effect does not target.
When resolving this effect, choose a number of Spell/Trap Cards your opponent controls up to the number of "Spellbook" Spell Cards in your Graveyard and destroy them. (You cannot activate this effect if you do not intend to destroy at least 1 card.)
When activating this effect, detach 1 Xyz Material from this card as a cost.
If there are no "Spellbook" Spell Cards in your Graveyard, you cannot activate the monster effect of "High Priestess of Prophecy." Additionally, if there are no Spell/Trap Cards on your opponent's side of the field, you cannot activate the monster effect of "High Priestess of Prophecy."
Continue with related public research
From this rulings page you can jump back into card data, set archives, tournament decks, banlist checks, and market movers.
Card database
Search Yu-Gi-Oh! cards, archetypes, stats, and printings.
Set archive
Navigate booster sets and inspect all cards in each release.
Tournament decks
Browse competitive decklists, player finishes, and archetype trends.
Banlist status
Check the current status of Yu-Gi-Oh! cards on the banlist.
Market movers
Track the top Yu-Gi-Oh! price gainers and momentum cards.