After a century of worship, I became the ancestor of the tribe

After transmigrating to the Great Wilderness, Shen Can, due to his "weak" body, became the guardian of the ancestral temple of the Blazing Flame Tribe, responsible for the daily cleaning, incense offerings, and daily sacrifices.
The wilderness was ravaged by floods, earthquakes, and rampant monsters.
Humans worship heaven and earth, but birds have no use for it.
Offering sacrifices to the monsters that bring disaster is of no use.
Human ancestors hunted wild beasts, used their blood to refine themselves, and created the first method of martial arts cultivation, foraging for food and survival in the wilderness.
Although this method is riddled with flaws, causing blood and qi to become chaotic during cultivation, burning scriptures and destroying the body, and with a flawed path ahead, it still allows the human race to find a place to survive in the Great Wilderness.
Therefore, the various tribes of the Great Wilderness built ancestral temples to worship their ancestors every year, to remember the hardships their ancestors endured in pioneering the land. Even the prey that came back from hunting would be offered to the ancestral temples for the ancestors to enjoy.
Shen Can, following the ancestral temple's instructions, used the "Luan Blade" to stab the neck of a wild beast and offer its blood to his ancestors. However, he discovered that he could absorb the lifespan of the wild beast and deduce cultivation methods.
So, who says that martial arts can only stop before the seventh rank and remain forever below the calamity beast?
……
Years later, the calamity beast Wuzhiqi, brought with it a massive flood, sweeping across the land and turning it into a vast ocean. The tribespeople knelt outside the ancestral temple.
"May our ancestors protect us!"
This book is also known as "I Steal Ancestral Offerings to Support Myself" and "Ancestral Offerings: Who Eats Them Doesn't Matter What".