Are there any novels about cards?

The book you are looking for is The Hero Killed with Me by Jewel Cat. The introduction is:

Zheng Ming, who crossed the plane, carried a pair of hero cards with him. As long as he has enough popularity, he can summon these heroes in Cary:

With the help of these heroes, you can cut the knife at once, climb the eaves and climb the wall, play with the flying fairy, and be ecstatic!

Of course, it is not impossible to slay the magic between heaven and earth in nine days, or to burn the sky and cook the sea in the ancient days. ...