Ghasfarost

Ghasfarost, known as the Tower of Gears, is a dungeon located northwest of Dahngrest in Tales of Vesperia. This was a tower made by the collaboration between Ragou and Barbos of the Blood Alliance, where the the party meet Judith who, unbeknownst to everyone but Yuri Lowell, is the Dragon Rider, where the Sorcerer's Ring is upgraded to the second level and where the Over Limit bar is increased to two.

History
Yuri and the Dragon Rider first arrive here to catch Barbos, but he expects their arrival. The dragon destroys the blastia that was creating a high speed cyclone around the tower. Barbos was not happy about that and before a clash began, the Dragon Rider got shot down. The dragon escaped but the rider and Yuri were imprisoned.

Inside their cell Yuri insults one of the guards for hurting an old man and during the skirmish, part of the riders' helmet broke off. After avoiding the scuffle, the rider takes off the helmet, revealing that behind the helmet was the face of a beautiful Krityan woman. He thanks her for saving the old man and she says she was repaying for helping her dragon Ba'ul. After taking off the rest of her armor Yuri asks why she went around destroying blastia, but she does not give an honest answer, however she promises Yuri she will not destroy his bohdi blastia. The two decide to work together by causing a riot in their cell, to which she happily agrees, giving them the opportunity to escape and freeing other prisoners in the process, though she slaps him on the face for going overboard. When Yuri introduces himself, she introduces herself as Judith and, with introductions out of the way, they decide to check out the blastia on the roof.

In an armory, Yuri gets his equipment back, but Judith's spear, the Brionac, is nowhere to be found, so she borrows a War Pike. When they get near some leaking aer, the Sorcerer's Ring reacted and as a result, the aer it can shoot out can push levers. In addition to that, the Over Limit bar increases by one level and Judith gave him a Duo Limit, an item that can allow any two people in the party to share Over Limit power in battle. Outside the tower Yuri was surprised to see his allies have come to help him. When he introduces the party to Judith, Raven instantly becomes infatuated with her. Yuri explains that she was on a research trip to check out the blastia and declares to ask Barbos where the aque blastia core is. As the party was about to head upward, Raven tells Yuri it would be nice to live here. This was only a cover though, because when Yuri left to catch up with the others, Raven senses the presence of Duke Pantarei who refuses his offer to help the party as he has other things to do.

On the way up, Rita notices Judith uses a spear just like the Dragon Rider, her alter ego. Rita is eager to beat him up but Yuri tells her the rider left. As the rest of the party proceed upward, Yuri tells Judith to keep the fact that she is the Dragon Rider a secret otherwise Rita will kill her.

At the top of the tower the party confronts Barbos, who uses his new blastia powered by the core of the aque blastia to attack them. As he was about to deliver a devastating blow, Duke arrives and uses his sword to destroy the blastia. Though the core remains in tact the blastia is useless and so Barbos was forced to fight the party on equal footing. After the battle, Barbos tells Yuri that he reminds him of Don Whitehorse in his youth and that he will make a lot of enemies, but he does not care. Barbos tells Yuri he would be waiting for him in the afterlife and falls to his death, putting an end to the Blood Alliance. In the process, he recovers the core for the lower quarter's aque blastia. At ground level, Raven disappears as the party was talking about the core, with Yuri deducing he went back to Dahngrest. Estelle tells Yuri while he was gone the Empire and the Guilds stopped fighting and he must have captured Ragou by now. Judith decides to part ways from the rest of the party to search for her partner and the remaining members of the party leave for Dahngrest.