Seath is an albino dragon who was born without scales, which meant he lacked the immortality that the other dragons possessed. Out of jealousy, he betrayed them, siding with Gwyn, the Lord of Sunlight, in the war against his brethren. After the Everlasting Dragons were wiped out, Gwyn granted Seath the title of Duke and gave him a Bequeathed Lord Soul Shard out of gratitude. Seath now resides in the Duke's Archives. He uses a special crystal that regenerate all wounds, meaning he's immortal now.