Tomonoshin will be unrestricted, and Obstruct put to 1! Check out the details on the official site.
Secret Sword, Comet
■ If a power 5000 or more monster on your opponent's field is attacking alone, and this card is in the soul of a card with "Secret Sword" in its card name, you may cast it. (You may not cast it from your hand.) ■ [Cast Cost] [Pay 3 gauge] ■ [Counter] Destroy that monster, and deal 3 damage to your opponent!