The Gration

Flagship of the VIth Legion of the Garlean Empire, of the same make as the fallen Agrius. It now lies grounded, its ceruleum engines sealed in aetheric ice by the hand of Shiva, Lady of Frost.
— Heavensward Sightseeing Log 36: The Gration

The Gration, a second ship of the Argius-class, was completed in the 56th year of the Emperor's Reign to support the VIth legion's Azys La campaign. The Clyteum factory shows incomplete hulls of two more Argius-class vessels. It is not known which legions they were meant for and how many, if any, have been commissioned after the XIVth legion's Argius and the VIth's Gration.

Aetheric ice presumably doesn't melt under normal circumstances, and with the VIth was defeated there's no one left to operate it, even if someone had the means, knowledge and incentive to thaw the magicked ice - which means the flagship will be chilling on Azys La for the foreseeable future.

Replaces the Lunar Whale mount and comes three sizes: x2 of the Lunar Whale, 1/2 of the True Size and True Size (600m long). You will not be able to use meaningfully use the full sized one outside of gposes.

The promo picture shows the 1/2 True Size model.