My System Only Rewards Me for Being Lazy, So I Killed an Immortal Emperor as a Newborn

A burned-out office worker dies at his desk and wakes up reborn as the pampered heir of the mightiest clan in creation, bound to a Slack System that only pays out when he refuses to train, cultivate, or lift a single finger. So he naps his way to invincibility, erasing an Immortal Emperor from his own crib before he can even walk, while his terrified twin sister grinds herself to the bone trying to catch up. As a whole realm brands his family the cursed "sinful line" and army after army comes to collect, the laziest young master in existence slaps down assassins, emperors, and entire holy lands without ever getting out of bed. This is a system, cultivation, and reincarnation xianxia face-slap recap with an OP invincible MC, LitRPG rewards, and a power fantasy that keeps getting more ridiculous — manhua and anime recap style. How far can one man climb by doing absolutely nothing?