Changing Destiny [BP01-EN104] Starfoil Rare

When an opponent's monster declares an attack: Target the attacking monster; negate the attack, and if you do, change it to Defense Position and it cannot change its battle position while it is face-up on the field. Then, your opponent chooses 1 of these effects: • You gain Life Points equal to half the target's ATK. • Your opponent takes damage equal to half the target's ATK.