Crystallization Cauldron
From Odin Sphere Wiki
The Crystallization Cauldron is the apocalyptic weapon created by the insane King Valentine before his death. It is capable of artificially creating red Phozon Crystals normally only found in the Netherworld, though it does so by absorbing Phozons from Erion and thus is likely to be dangerous to the environment. While it will respond to King Valentine's voice openly, it will primarily obey the commands of those possessing the Ring Titrel, which results in a scramble by several characters to possess the ring throughout the story.
The Cauldron was responsible for the destruction of the Kingdom of Valentine, as Ingway sabotaged it in order to save his father, Demon Lord Odin. Afterward, it and the ring came into the possession of Fairy Queen Elfaria, who used it to gather phozons for the Fairie's use, as the magical beings needed phozons to live.
The Cauldron War began afterward, a conflict between the Vanir and Aesir over the Cauldron. Odin managed to capture it partway through the war, but due to the actions of Velvet it was deactivated and the ring Titrel left in the Dragon Wagner's safe keeping, greatly delaying Odin's plans for the Cauldron. Through the actions of Oswald and Gwendolyn he managed to secure the ring for a short while, during which time he used the Cauldron to absorb phozons from Ringford, damaging sections of the Forest. The Vanir shortly afterward counter-attacked the Aesir, retaking the Cauldron in a stunning victory.
Following this, King Valentine made his way to the cauldron with his pet dragon Leventhan. While Leventhan settled within the cauldron, Valentine commanded it to absorb every Phozon from Erion, critically damaging the world and setting off the Armageddon. The energy from the phozons were used to exponentially speed Leventhan's growth. During the incident, Velvet made her way to the Cauldron and disabled it without permanently damaging it's core. It was too late however, the damage was done and Leventhan was fully grown. After Gwendolyn managed to destroy Leventhan and arrived at the Cauldron in Oswald's hands, Velvet used the phozons stored within her own Psypher, along with Cornelius', Gwendolyn's and Oswald's to restore life to Erion, though she was cursed into the form of a Pooka through her actions, as a result of a curse Valentine had recently placed on it.
Following this, the Cauldron is not seen again, so it could be speculated the already damaged furnace was destroyed with this last action.
