Became a Demon with Pregnancy System

Luke was reading a novel and after reading it, he fell asleep. When he woke up he was not in his bed. He was somewhere else. This was a world full of magic. He finds himself transmigrated into the novel he was reading. He was in the body of the Skywing Wolf, a powerful commander-level demon attacking Silvercrest City. Luke didn't mind being human or demon. Being a demon might even be better; after all, demons were powerful in this world. But becoming the Skywing Wolf who had already invaded Silvercrest City? That was not good. The Skywing Wolf was a villain in the novel, who was going to die at the hands of the protagonist. He had one year time to get stronger, otherwise he will die at the hands of the protagonist. He was losing hope. That's when the system arrived. [Ding! Perfect host detected.] [Do you want to accept binding?] "Yes, accept!" Luke stood up, excited. The heavens hadn't forgotten him after all. [System binding…] [Binding successful!] [Congratulations, host! You have obtained the Pregnancy System.] [Impregnate Women, Have Children, obtain rewards and create the strongest Family] "Forming bonds and nurturing the next generation to become stronger—who wouldn't like that?" he thought with a smile. Especially in a magical world; if you work hard enough, building the strongest empire is within reach. [You have a newbie gift pack. Do you want to open it?] "Open it," Luke said without hesitation. [Opening newbie gift pack…] [Congratulations! You have obtained a Transformation Pill and a double purity blessing for all attributes.] Note: This novel doesnot contain NTR, YURI scenes. The MC goal is to create the strongest family.