Kiseki Wiki
Kiseki Wiki
Millium Orion - SD Model (Sen III).png
Hold on, it looks like Millium wants to tell you something.
Hey-hey! White Rabbit here! Lammy scanned this article and said it contains unmarked spoilers for all Trails games. Turn back now if you don't want to get lasered! Okay, byee!

The Tuatha De Danann (トゥアハ・デ・ダナーン), also known as the Empyreal Fortress (幻想機動要塞), is a flying fortress used by the Kin of Earth during their war against the Kin of Fire prior to the Great Collapse. It is said to be their ultimate creation.[1]


The Tuatha De Danann disappeared as it was caught in the space-time disruption at the end of the clash between Ark Rouge and Lost Zem when the Great One came into existence.[1]

The Black Workshop has spent the past thousand years renovating it in preparation for its use during Operation Jormungandr.[1] It serves as the stage for the last Rivalry.[1]

When it appeared above Osgiliath Basin on 30 August, S.1206, it was accompanied by five pillars similar to the Salt Pales. It is speculated that the residues remaining in the earth were used to fortify the construction.[1]

The party consisting of Class VII (Old and New) faced several roadblocks throughout their incursion into the fortress. They included, in order:

Afterwards, Class VII teamed up with all five of the teams dispatched to the Salt Pales to defeat Ishmelga in its true form and brought the curse of Erebonia to an end.



  • Tuatha Dé Danann are a supernatural race in Irish mythology. Family members of the Tuatha Dé Danann include Lug, reminiscent of the geologist persona's name Black Alberich assumed in Trails of Cold Steel III, and Balor, referring to Black Alberich's combat shell, Zoa Balor.


  1. 1.0 1.1 1.2 1.3 1.4 Trails of Cold Steel IV, Act 3: "Seekers of the Dawn", 08/30. Cite error: Invalid <ref> tag; name "Sen4-060830" defined multiple times with different content