Sanctum Omega is South of Jeondong and North of the Ruins of Udrodzid, in the patch of forest claimed by the country of Kapsia.
Somewhere within the continent of Tulsa-aria, within the large mountain range, a sanctum where "A great evil was defeated 10 years ago" has been found by the foundation. It's location and existence is kept secret by The Slowcart Foundation, who are rumored to have agents guarding the area.