What is Fu Bao in Xiuzhen's novels? What is the specific function? How to use it? How many times can I use a card?

Fu Bao is made of a magical weapon. It has some power. Some of them are only used once, but they are also used several times. Electricity consumption will be reduced every time. But because of its great power, the protagonist of general novels will accidentally own it and use it to kill the enemy. Not all the novels that fix the truth, such as the recent immortality, are gone. If you have more ideas and don't stick to the existing novel style, I will support your novel. Nowadays, the style of the novels of fixing truth is similar, which is very bad.