Tengu format ruling
Vicious Claw

Card effect (current official text)The equipped monster gains 300 ATK. If the equipped monster would be destroyed by battle, return this card to its owner's hand instead. Then, destroy 1 monster, except the one that battled the equipped monster, and inflict 600 damage to your opponent. After that, Special Summon 1 "Evil Token" (Fiend-Type/DARK/Level 7/ATK 2500/DEF 2500) on your opponent's side of the field. During the turn this card is returned to your hand, you cannot use "Vicious Claw" from your hand.
Rulings
- Vicious Claw does not target the monster it destroys.
- If you cannot destroy a monster, no damage is inflicted to your opponent's Life Points.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.