| Category | Labyrinths |
| Continent | Straiden |
| Region | Salak |
| Built | 1 Kindle 1490 DE |
| Map | Rubeth |
In the Creation War ( 1486 DE - 8777 DE ) , a disembodied thinker named Eysveig constructed this subterranean laboratory. Eysveig would physically spend time here when not assisting his superior, the Nine-Tongued Worm. During his absences, when a critical experiment was underway, he would utilize several of his numerous brains, mentally linked to his lab coats, to observe and advise through their perspective.
Eysveig's Infirmary was a nightmarish establishment where the friendly and enemy wounded underwent experimentation. For those with potential military intelligence, Eysveig's mindbenders and torturers relentlessly extracted their secrets.
The tale speaks of how, upon Eysveig's demise, fragments of his being were dispersed across the land of Šadullu. Gathered by his followers, these remnants were transported to Eysveig's Infirmary, where they were subsequently employed in the genesis of the Grell race.