Fading Vet? Wife-Taking System Rises!

The story

Finn Rowe, a dying 75-year-old veteran in Great Chou, awakens the Wife-Taking System via his scheming daughter-in-law’s young wife, marrying wives reverses aging and grants strength. He subdues his family, tames the army and outshines scholars; as Great Chou falls, he rises... Will he be the founding emperor?