King of the Frost Giant tribe «Thrym» once transformed into a wolf and infiltrated Jötunheimr to steal the Holy Sword Excalibur. He then threw Excalibur into «Urðr's Spring», a lake at the center of Jötunheimr, where it impaled the World Tree and cut off its roots. At that moment, Jötunheimr lost the blessings from the Tree and quickly degenerated into a barren wasteland of frost. As the roots of the tree retracted to Jötunheimr's canopy, the frozen lake was pulled up along with the roots. Thus the large mass of ice reached the canopy of the world, where the ice dungeon was formed and later fashioned into Thrym's castle, Thrymheim.
Under Þjazi's command, Thrym then ordered his subordinates to capture, imprison and kill the Rock Giant tribe. With this, the power of Queen of the Lake Urðr and the power of her sisters would completely vanish, and Thrymheim would be allowed to rise to the plane above, Alfheim, and invade it. He would then continue to cover the land in snow and ice and advance up the World Tree, where the «Golden Apple» is kept.
However, as massacring the Rock Giant tribe proved to be a difficult task, Þjazi began offering a quest to the fairies to help the Frost Giants massacre the Rock Giants, promising them Excalibur as a reward for their help. However, as Excalibur is integral in keeping Thrymheim from melting, Þjazi would actually reward the players with a weaker version of the sword, called the «Fake Sword Caliburn».
The players can accept the quest from an NPC named «Archduke Þjazi» in the largest castle in Jötunheimr. Once the quest is accepted, the players must find and kill any Beast-type Evil Gods that they can come across and, throughout the quest, Frost Giants will assist the players in their battle with the beasts. Meanwhile, an alternative quest is offered by Urðr to players who have befriended a Beast-type Evil God. Which quest is completed first would determine the outcome of the event and the fate of Jötunheimr and Alne. If the slaughter quest is completed first, the giants would invade Alfheim, destroying Alne in the process, and would lead to a follow up event, called Ragnarok, during which players may take up a quest to stop the Frost Giants before they can cover Alfheim in ice and advance up the World Tree.
- Quest Failed
- In the non-canon ending of Calibur, Calibur SS, it was revealed that the quest's progress was sped up due to Marinca activating the Cardinal's quest acceleration function during a maintenance, but forgetting to disable it afterwards.
- As ALfheim Online is based on the entire version of the Cardinal System from Sword Art Online, the Cardinal System in ALfheim Online has the authority to autonomously delete maps in the game and create a backup immediately afterwards that would make it hard to perform a rollback to undo the damage done.
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