Dresera

Background
Dresera, better known as The Eye of Tiamat, is a weapon of enormous power in its ability to cut through the hides of Dragons and Wyrms. It grants enormous power to its wielder, far beyond the limits found within the nature of their body. It is the remains of the Primordial mother of Dragonkind, Tiamat, and is the largest of Wyrmstones, the same size as the Eye of Bahamut.

Like all Wyrmstones, it binds itself to a host, and grants them enormous power while slowly corrupting their form until the being's revival at the cost of its host's life. However, this does not seem to be the case for the previous wielders of the stone.

The spirit held within the weapon is female, and seems to know a great deal about Seraiya, Asmyral, and every Wyrmqueen and Wyrmlord. She often warns Ryu of things, and will berate him if he does something overly foolish.

There is another form of Dresera, the supposed original held within Irakiel's temple, it is impaled within Seraiya's corpse and seems to be aware, though its voice cannot be heard.