Star Wars Knights of the Old Republic II: The Sith Lords/Trayus Academy

Malachor Depths
As you enter the bottom end of the Trayus academy from the depths once Bao-Dur's remote has activated the, Darth Sion strides into its top end from the Trayus core. Six Sith assassins decloak and kneel around him as Kreia speaks telepathically:

The Sith assassins rise and cloak:

Meanwhile, you face an elite Sith assassin at the bottom end of the academy's antechamber:

Force powers are rarely if ever used, and you can return to the depths if you want.

Antechamber
There's nothing of interest down any of the halls lining either side of the antechamber, except for those at the very top. Three Sith assassins guard the top end of the antechamber, and three more guard each of the doors in the top left and right halls.

Sith assassins rarely if ever use Master.

This is the choice Kreia told Darth Sion you would face: to get to the Trayus core at the top end of the academy, you can go through the Trayus prison (renamed Trayus Crescent) on the left side, or the on the right side. The choice isn't actually meaningful (without the ../Restored Content Mod/, at least) and you can do both, but this isn't necessary. The proving grounds do contain a, though...

Trayus Prison
Behind the door in the top left wall of the academy's antechamber is a short corridor to another door, beyond which is the top right end of a curved corridor, guarded by three Sith assassins, with two more midway down.

This curved corridor continues beyond the door at the bottom left end, where the top left end of the lower section is guarded by a male and female dark Jedi apprentice with three Sith assassins, with two more by a metal box at the bottom right end.

Dark Jedi apprentices rarely if ever use Force powers.

Beyond the door in the left wall back at the top end of the lower curved corridor is the top left end of the next curved corridor, guarded by four Sith assassins, with a male and female dark Jedi apprentice midway down, and two more Sith assassins at its bottom right end.

The ../Trayus Crescent/ is beyond the three doors in the outer left wall.

Trayus Proving Grounds
Behind the door in the top right wall of the academy's antechamber is a short corridor to another door, beyond which is the top left end of a curved corridor, guarded by three Sith assassins, with three more midway down.

This curved corridor continues beyond the door at the bottom right end, where the top right end of the lower section is guarded by a female dark Jedi apprentice and three Sith assassins, with three more midway down, and another four at the bottom left end.

Beyond the door in the right wall back at the top end of the lower curved corridor is the top right end of the next curved corridor, guarded by three Sith assassins, with a male and female dark Jedi apprentice and three more Sith assassins midway down, and three more with a metal box at its bottom left end.

The Trayus proving grounds are beyond the door at the top end of the outer right wall.