Step 1:
Enter the Kotl Dungeon. If you have access to an Eodon Teleporter, travel to the Urali Tribe Village and head SE, the entrance is a few screens away.
Go all the way to the back (north) and to the right (east) There you will find an area with many levers and a locked door.
Flip the levers in the correct sequence to unlock the door. If you pull an incorrect lever you will be electrocuted so be careful.
Once you have found the correct sequence, the door will open. Enter the room and spin the dial to turn back time.
Once you have completed that, head south and east, there used to be a rock wall there, it will be gone.
Once this wall drops, you will have access to the second stage of the puzzle.
Find the correct tile to step on to proceed...do this until you reach the end, then go through the floor tiles to the next room.
Here you will see chests sitting on some strange looking equipment. Place a power core in one chest on each activator to begin the simulation. A message will announce when this occurs.
Step through the portal to the north to enter the center of the city.