Advanced format ruling
Ritual Buster
Card effect (current official text)Activate only when a Ritual Monster is Ritual Summoned. Your opponent cannot activate any Spell or Trap Cards or use their effects until your next Standby Phase.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.