Ding! Congratulations, You've Awakened the More Children, More Blessings System

He transmigrates as a good-for-nothing in the world of immortal cultivation, but binds himself to a more children, more blessings System. Every child he fathers grants him a century of cultivation, a heaven-defying treasure, and the talents of his descendants can even feed back into his own. So Lin Fan begins taking concubines at a furious pace, from mortal women to saintesses, demon empresses, and divine maidens... A thousand years later, when the allied forces of the Immortal Realm come knocking, they see the sky crowded with Lin Fan's descendants, every one of them an Immortal Emperor, and fall collectively silent.