Naruto: The Steadiest Clan Leader, Ruling the Shinobi World Through Childbearing

After transmigrating into the Hokage world, he finds himself in the midst of the Uchiha Clan Massacre. Uchiha Ting narrowly escapes by faking his death and awakens an overpowered childbearing-to-grow-stronger System. Only he and Sasuke remain of the entire clan, and their bloodline is on the verge of extinction. With the Uchiha's accumulated wealth of trillions at his disposal, he abandons the old path of arduous martial training and spends lavishly to recruit promising kunoichi and continue the bloodline. Each child born into the clan unlocks chakra and top-tier ninjutsu, allowing him to gradually strengthen the clan, counter the schemes of the Konoha High Command, crush the forces coveting their power, and restore the Uchiha to glory.