If your opponent would use cards like "Mirror Force" when you attack, you can use this card to take control of one of their monsters, their own Trap Card destroying one of their key monsters along with your own.
You can use cards and effects that allow you to perform a Summon during the Battle Phase, such as "El Shaddoll Fusion", "Urgent Tuning", or "Wonder Xyz", to use your opponent's monster as a material before it returns to your opponent. Alternatively, you can also use cards to tribute your opponent's monster, such as "Mystik Wok".
Use this card during your opponent's Battle Phase to take control of one of their monsters, preferably the strongest one, so it'll prevent your opponent from using that monster to attack you during that Battle Phase. While it means you can't attack with it, it will help minimize the damage you'll take during that turn, even if it only helps stall for one turn, it can be the difference between winning and losing the Duel.