The Endar Spire is the ship on which Trask Ulgo and Rarth Devan worked. Except neither of them actually did anything, and nobody knew why they were there.
The vessel was under command of a Jedi named Bastila, actually a superpowered interdimensional being with unlimited power, but despite this there are many useless rules such as don't try and repair broken droids, and don't use blasters on the bridge.
The Spire was also home to an infamous Cantina frequented by both Devan and Trask, although Devan never once noticed Trask despite both attending the Cantina every single night for two years. Strange.....
The Endar Spire was destroyed by the Leviathan just after Rarth and Carth escaped. However, they could have delayed its destruction by just not leaving. Stranger.....
As the Endar Spire was being destroyed, the hyperdrive randomly activated, teleporting the majority of the ship to the lava planet of Mustafar. Although intact, the ship was highly unstable. Nearly 5000 years later a Rebel Alliance scout crew discovered the ship and retreived its logs on Trask Ulgo. They were then attacked by the droid that Rarth Devan reprogrammed before he escaped the ship, and it stole the files and escaped with them. Strangest....