what exactly is the ragnarok

[Roogle]

Im guessing that it wasnt made until after the war, seeing as the estharians only went to space to lock adel up there. Ragnarok was probably made to carry the seal up there.

I thought that this was the case, too, but the game establishes that it was the flagship of Esthar until it was used to send Adel into space, so it must have been created before or during the reign of the sorceress.

As posted by Mr. Burns:

Spaceship Ragnarok
Esthar's space shuttle. Based on an ancient Centra legend of the Dragon Ship. Esthar's finest scientific technology was used to build it. Esthar's flagship, until it was used to send Adel's Tomb into space.