Advanced format ruling
Infernity Beast
Card effect (current official text)If this card attacks while you have no cards in your hand, your opponent cannot activate any Spell or Trap Cards until after the Damage Step.
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.