The Demon Lord System and the Beautiful Heroine

Other people's Systems give them treasures, cultivation techniques, and big rewards from time to time. Even the Systems themselves are cute anime girls. But my System looks like it came straight from the Main God! The rewards for success are paltry, and failure means getting erased. I must have gotten a fake System. Just as Xia Ya decided it was time to rebel against his stingy, exploitative System boss, the System gave him some item cards to help him complete his missions. The aloof knight, Saber; the Railgun girl, Misaka; the fiery-eyed Shana; the sexy older woman, R-Rider. He could use these anime cards to raise anime characters. For real? What! If he raised them well, he could even create Saber's knight order, an army of Misaka clones, and an army of fiery-eyed Shanas. Damn, what do you want me to do, become a Demon King? I'm in. Xia Ya accepts this job.