I Steal the Ancestors' Sacrifices to Nourish Myself

After traveling to the Great Wilderness, Shen Can became the Ancestral Temple Keeper of the Blazing Flame Tribe due to his 'frail' body, responsible for the daily cleaning, offering incense, and routine sacrifices at the Clan Ancestral Temple.. Shen Can fulfilled his duty as Ancestral Temple Keeper by using the 'Simurgh Blade' to pierce Wild Beasts' necks, extracting their blood to offer to the ancestors, only to discover that he could absorb their lifespan to deduce a cultivation method. — Description from novelcodex.org