Tengu 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.
Rulings
- If you declare an attack with this card while you have no cards in your hand but an effect causes you to have at least 1 card in your hand before the attack is complete, your opponent can activate Spell or Trap Cards.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.