Exiled to Eternity: Immortal without Equal

After transmigrating and becoming the crown prince, Rick Merton is framed by his brother and exiled to guard the royal mausoleum for life. Just as he resigns himself to obscurity, he awakens a Longevity System that grants him an endless lifespan, powerful techniques, and legendary artifacts through daily rewards. Choosing to hide his strength, Rick quietly cultivates for decades until his nephew comes to him seeking help in resolving a national crisis.