Heavenly Void Furnace

Heavenly Void Furnace is a time-compression cultivation furnace whose significance grows from a cosmic furnace that subjects entrants to immense subjective durations. Seo Eun-hyun later exploits it for rapid cultivation but carries hundreds of billions of years of suffering; it is central to Hong Fan's hidden history. Its changing use links personal inheritance to the larger struggle over travel, authority, survival, and ascension. (Chapters 664, 668, 671, 719, 723, and 810)

History and use

A cosmic furnace that subjects entrants to immense subjective durations. Seo Eun-hyun later exploits it for rapid cultivation but carries hundreds of billions of years of suffering; it is central to Hong Fan's hidden history. The item remains materially important because its power changes what its wielders can reach, survive, command, or preserve; references to copies or transformed forms are not treated as proof that every instance is the same physical object. (Chapters 664, 668, 671, 719, 723, and 810)

Properties and limitations

The Heavenly Void Furnace does not grant unlimited power. Its performance depends on custody, condition, the wielder's cultivation, and the surrounding formation or realm. When the story distinguishes an original from a replica, a later completed form, or a manifested version, those states are treated separately even when they share the same name. (Chapters 801, 802, 803, 804, 805, and 810)