Story of the Cursed Arm

Details

Level	16
Quest Giver	G.S.D.
Briefing	Something must be going on in Sky Tower. My demon-possessed arm seems to be responding to a powerful energy coming from the Tower... Yes, it's trying to tell me something. I hear that you've been exploring Sky Tower. If you don't mind, could you come talk to me?
Objectives	Visit G.S.D.

Level	16
Quest Giver	G.S.D.
Briefing	You know, the creatures of Sky Tower are different from ordinary creatures. Something tells me the energy of the creatures of Sky Tower has something in common with that of my demon-possessed arm. So, could you bring me something that contains the energy of the Sky Tower's creatures?
Objectives	Collect 15 Radiant Dragonoid Eyes from the Dragonoid Nest of Sky Tower on Master's Road (or a higher level).

Level	16
Quest Giver	G.S.D.
Briefing	I guess I was right. It's not clear how, but the energy that's possessing these eyes is somehow related to the energy of my demon-possessed arm. I'll need to go up to the Tower to investigate this, but if I'm right, I might be able to figure out the mystery of the demon-possessed arm from which every Slayer in Arad is suffering. Kind Dungeon Fighter, would you be willing to guide this old blind man through Sky Tower?
Objectives	Escort GSD and clear Dragonoid Nest of Sky Tower on King's Road
Notes	This quest must be performed alone, and cannot be completed if GSD dies while clearing the dungeon.

Level	18
Quest Giver	G.S.D.
Briefing	I felt my demon-possessed arm reacting more powerfully to an energy source on one of the higher floors of Sky Tower. I'm sorry, but can you guide me through the Tower one more time? This time, how about we go even higher?
Objectives	Escort GSD and clear the Puppet Museum of Sky Tower on King's Road.
Notes	This quest must be performed alone, and cannot be completed if GSD dies while clearing the dungeon.

Level	18
Quest Giver	G.S.D.
Briefing	I want to discern the true purpose of Sky Tower. Where are these creatures coming from? Do you know? I know we have a lady from Empyrean in town that might be able to answer my questions. I want to meet her in person. You can come along if you want.
Objectives	Talk to Kiri.

Level	20
Quest Giver	Kiri the Lady
Briefing	I know one thing's for sure. A thousand years ago, the tyrannical dragon, Bakal conquered Empyrean. He built the Tower between Arad and Empyrean to sever the connection between the two worlds. All those creatures in the Tower were created by his evil magic.
Objectives	Clear the Golem Tower on Master's Road (or a higher level).

Level	22
Quest Giver	Kiri the Lady
Briefing	I remember seeing an ocean in the middle of the Tower when I was falling from Empyrean. I dropped right into the water, which must've been how I survived. Castellan's Chamber, where Sieghart the Castellan of Light resides, is somewhere in the Middle Ocean, but the ocean is so vast! My guess is that you'll have a hard time locating the chamber. It'll be tough, but we still have to try!
Objectives	Clear the Vestibule of Darkness on Master's Road (or a higher level).

Level	25
Quest Giver	Kiri the Lady
Briefing	Yes, I'm sure that the place you're talking about is Castellan's Chamber, where Sieghart lives. You should bring Sir GSD to that place. Why don't you go ahead first? I'll go ahead and send a message to Sir GSD.
Objectives	Escort GSD and clear Castellan's Chamber in Sky Tower on Master's Road.
Notes	This quest must be performed alone, and cannot be completed if GSD dies while clearing the dungeon.

Level	25
Quest Giver	G.S.D.
Briefing	My demon-possessed arm was definitely responding to the energy surrounding the Castellan of Light. Bakal, his creatures, and my demon-possessed arm... I want to know how they're all related. Hmpf... At this point, it might be a good idea to just ask a Clairvoyant. This is much too much of a mystery to figure out on my own. Thank you for your help so far, though! Feel free to come back if you find any clues that might help me answer my questions!
Objectives	Visit Iris the Clairvoyant standing next to Sharan in West Coast