Who Brought Him into the Cultivation World?

Han Yu has a special ability: he could produce a random pill with unknown effects everyday. His pills are so powerful and inhumane that there's an unwritten rule in the Cultivator Realm: even if you become sworn brothers with someone from the Demonic Path, you must never be related to Han Yu.

Explosive Qi Pill: “After consumption, True Essence will continue to explode for one two-hour period. During this process, you must constantly channel the medicinal power, or else the body will explode. Side effects: Overflowing True Essence, clothing disintegrates.”