The Bastard Duke's Son Fights His Way to the Top

After transmigrating into the household of a duke as an invisible son born to a concubine, Li Xiuyuan just wants to lie flat, eat his fill, and wait to die. But with war raging and factions at court vying for power, he is forced to bring out his modern way of thinking and his historical golden finger. From a lazy nobody to a prince with power over all under heaven, he doesn't want to get caught up in the struggle, but he has no choice!