The Executor Encounter (Revised)

Captain Kirk took the USS Enterprise NCC-1701 to the Beta Gamma star system, where a vortex was discovered. Emerging from the vortex was the Super Star Destroyer Executor. The Klingons attacked the Executor with 3 D7 battle cruisers and she destroyed all 3 but suffered bad damage. Kirk reported the incident to Starfleet which sent the entire Federation First Fleet to intercept her. A fierce battle ensued in which 6 Federation starships were destroyed and another 10 suffered bad damage. The Executor was not so lucky. She was destroyed with all hands lost, except for Darth Vader, who escaped in his TIE Advanced fighter.