No one knows where they hail from, or what their goals are.  First contact: A MEMS/MIMS trade convoy once was attacked by a lone member of this species, utterly annihilating the trade convoy.  [Redacted] investigated, and found no evidence that any type of conventional weaponry was used, but they did see evidence of massive energy displacement. 

ATs apparently think or envision scenarios, taking a great deal of time to do so utilizing unknown energy sources to affect reality.  Once the scenario plays out in their mind (or truly, wherever), however, it happens.  During talks with a [Redacted] delegation, a Tractatores individual proved their power by displacing the entire planet they were on to another galaxy.  The planet still resides there, in a stable orbit, around a compatible sun.  Since these initial forays into the affairs of the galactic community, they have mostly kept to themselves, on unknown keels on unknown paths.