I, Outer Demon, Invest in Villains to Become Invincible

Qin Fangyuan's Dao heart was shattered by a Son of Destiny, leaving him content to sweep floors in the Scripture Pavilion for a century. When his investment system finally awakens, there's a catch: he can only invest in villains. Forced from retirement, he reluctantly takes on disciples destined to oppose heaven's chosen ones. But his villainous students have grander ambitions—they're stealing the protagonists' heroines, claiming their treasures, and presenting everything as 'filial offerings' to their master. As his disciples drag him into one heavenly confrontation after another, Qin Fangyua…