What's the use of Kiki Phantom's card?

Kiki Phantom's card is used to get the best equipment such as Phantom (new role) and gold M 14EBR. Phantom prop card is a special prop for online games to cross the fire line challenge mode. After the player buys the equipment phantom prop card, there is a certain probability to get the best equipment such as phantom (new role) and gold M 14EBR at any level in the challenge mode.