Eternal Crucible

The Eternal Crucible (also known as the Eternal Furnace) is a divine implement in the lore of Dota 2.

Description
Purifying flames roar and flare within the Eternal Crucible. It is stated that its flames can purge the powers of those who are placed and locked inside of it. Because it is described as an eternal object, the furnace may have something about it that is eternal, such as its flames which burned Wukong for 49 days.

Heroes
owns the Eternal Crucible. He agreed with his brothers to burn Wukong in it for 49 days to purge his heavenly powers as punishment for his crimes, but failed.

Heroes
was consigned to the furnace's fires for 49 days by the Celestials, that he may be purged of his heavenly powers and punished for his crimes. Instead of being burned, the stories say that he resented at first before resolving to be stronger, realizing his limits. Unable to die, he was soon empowered by the fires that never consumed him.

Trivia

 * The Eternal Crucible is based on Laozi's Eight Trigrams Furnace in the original Journey to the West novel. In the original story, Laozi reported to his Jade Emperor that Wukong had accumulated so much immortality from the various consumables that preserved him thru all kinds of executions that the heavens tried upon him. Therefore, Laozi had him locked into his furnace so that its flames may reduce him to ashes while distilling him down to Laozi's pills of elixir to be recovered from his remains. Rather than simply willing himself to be stronger in Dota 2's version, Wukong survived by squeezing into the furnace's corner that had Xun (☴ or 巽), the fifth of the eight trigrams symbolizing wind. And where there's wind, there is no fire. In this corner, the wind blew smoke into his eyes, causing his eyes to turn red with golden pupils. There he survived for 49 days until the furnace was opened, giving him an opportunity to escape from his shocked enemies before chaos in heaven ensued.