The Thief of Laws Ancestor

A master and a servant were captured by a monster! The little fox: "Young master is only fourteen, his meat is tender, let's eat him first!" Song Ziyu: "The little fox's cultivation is already at the Foundation Establishment stage, very nourishing, let's eat her first!" The little fox: "I have little meat, young master has a lot of meat to fill us up, let's eat the young master first!" Song Ziyu: "..." This is a story about cultivating immortality by stealing spells!