There are novels related to Hero Kill. I recommend "Super God's Hero Kill" to you. This is a light novel written by the author, Never Act Cute and Courting Death Cat. After the main character passes through the world of the Great Soldier Company, he obtains the Hero Kill System. After completing the mission, he can obtain various cards and hero abilities. It looks very interesting.😋I hope you like my recommendation, Mwah ~😗