The Shadow Lord Battle
You enter Castle Zvahl, fighting through hordes of the Kindred demons until you finally reach the dark throne room. Zeid is there, waiting. His eyes are fixed on the back of the room, where a large stone casket lays surrounded by magicite crystals.
Zeid: Could this be... Yes, it is the tomb of the Shadow Lord!
The magicite begins to glow, and the casket shakes violently. Violet light gathers above it, and the lid of the casket slowly begins to raise. Mist flows out from inside the coffin. Lying inside is the corpse of a mammoth Demon. He is slowly raised out of the coffin, coming to the ground with a loud thump onto the ground. He opens his eyes and strides boldy towards Zeid.
Shadow Lord: Ah, the dark knight... It's been twenty years since we last met, Zeid.
Zeid: No! How is this possible? I defeated you!
Shadow Lord: I cannot die. Not until I have eradicated you and your kind from this world.
Zeid: So it is true... I suspected as much since we last met. You are a Galka!
Shadow Lord: Thirty years ago, I was in a group that came to this cursed land, seeking to uncover the secrets of a lost civilization. And it is here that I fell, betrayed by one I trusted with my life. My friend Ulrich could not abide the fact that I was the best swordsman of the Mythril Musketeers. That I was advocating peace with the beastmen at the time was not to his liking, either. Cornelia died protecting me... But I came back. Not even death could keep me from exacting revenge on those who wronged me. A power hidden deep beneath the earth gave me a new form and granted me control over the nether beasts. It was then that I became aware--that I was made aware--of the dark anger smouldering deep within my soul. I realized it was not revenge that drove me, but the old, undying anger of our race: the wrath of the Galka! Others cannot fathom the depth of our rage. But I cast myself willingly into its flames, and broke the chains of mortality! Your kind awoke the fury within me, and I was reborn into rage incarnate--as the Shadow Lord! I swore to myself then to purge this world of your kind, and I will not rest until I crush every last one of you!
The Shadow Lord casts a binding spell on Zeid, rendering him immobile.
Shadow Lord: I underestimated you twenty years ago, but I will not make that same mistake again!
Zeid: What!? No!
Shadow Lord: Stand there and watch, Zeid. Search within for the dark rage, the flame that burns in the souls of all Galka!
The Shadow Lord turns to you, a smile upon his face.
Shadow Lord: Now... I will cleanse this world of your filth, unless I am first consumed by fury! Come, it is the hour of reckoning! Death itself failed to stay my wrath. Let us see if you can do any better!
An epic battle ensues between you and the Shadow Lord. Using your weapons, you dodge and endure the Shadow Lord's crushing blows long enough to wear him down with your own. Just when you think he's been defeated, the Shadow Lord shifts his form, growing stronger against your hand-to-hand attacks. You switch to magic, hurling spells at him until the Shadow Lord can no longer stand. He falls to the cold floor.
Shadow Lord: No... it is not over yet! I told you, even death cannot stop my revenge! I will not fall! I will keep coming back, until the fires of wrath consume me!
Zeid: Raogrimm, stop! Listen to me, it is over!
Shadow Lord: "Rao...grimm"? No, that is not my name! I am... I am the Shadow Lord!
Zeid: You are no such thing! Search your memories for your true self! You are Raogrimm, the Galka's greatest swordsman!
Shadow Lord: I... I am... Rao...Raogrimm!? Aaargh!
A vision of a Hume woman appears before the Shadow Lord. It is Cornelia, who gave her life to save the Galka Raogrimm. The Shadow Lord is consumed by light, and when it clears it is not the Shadow Lord that lies before you, but Raogrimm, former Talekeeper of the Galka. Zeid breaks free of his binding and rushes to Raogrimm's side.
Zeid: Do you remember?
Raogrimm: Yes... I do now
Zeid: Raogrimm, it is good to have you back. How has all this come to be?
Raogrimm: As you know, I was the Talekeeper fo the Galka--the keeper of our race's memories. But there was so much pain, so much anger... I let myself become trapped in a dark abyss of swirling rage and madness...
Zeid: Raogrimm...
Raogrimm: People are capable fo kindness beyond angels, yet we also commit sins that would put a demon to shame... We all stand precariously on the edge between darkness and light... And when we fall, we are greeted by only madness and chaos. And so I have fallen... There is no salvation for me. The Raogrimm who you once knew is gone, forever. I expect no forgiveness for what I have done, but...
Lion runs into the room.
Lion: Come on! This way, hurry!
The Throne room begins to shake, and the Shadow Lord appears, looming over Raogrimm, the image of Raogrimm fades, he is the Shadow Lord once more. A light appears inside him, and Lion, Lindain, and Zeid run out of the room.
Raogrimm: My true self died thirty years ago... All that remains is an empty shell... Cornelia... Finally, we may meet again...
The Shadow Lord is engulfed with a brilliant explosion, at last he has found Peace... Outside Castle Zvahl, the snow falls silently before Lindain, Zeid, and Lion.
And so the Shadow Lord was defeated thanks to your selfless courage and sacrifice. Through the clouds shines a symbol of newfound hope for the peoples of Vana'diel. But none should forget that wherever there is light, there is always shadow. The Legend goes on to say... From the darkest depths of the eart the Warriors of the Crystal rose...
Lion: So... I guess this is goodbye for now. I hear they'll start flights to the Outlands soon. When they do, come see me in Norg sometime. I'll be seeing you, Lindain. Bye!
Zeid: I, too, feel that our paths may cross again. Until then, I wish you farewell.
Source: http://ffxi.allakhazam.com/db/guides.html?guide=309