The Kree Mar-Vell, disguised as Wendy Lawson, headed a United States Air Force and NASA project titled Project P.E.G.A.S.U.S., powered by an extraterrestrial object known as the Tesseract. Unbeknownst to the organization, Mar-Vell was working on the project for a race known as the Skrulls.
The engine was designed by Mar-Vell for use by the Skrull refugees in order to escape the Kree and find a new home outside of their reach. The device utilizes a completely different propulsion system than the jump portal network used by many other races, including the Kree. This would let the Skrull find a planet to live on that was inaccessible to the Kree.
Mar-Vell was considered a traitor by the Supreme Intelligence and was ordered to be killed by the Starforce. While running tests of the engine alongside pilot Carol Danvers, Mar-Vell was targeted by a Kree ship in the aims of recovering the engine. Mar-Vell's ship was shot and crashed, and as she and Danvers escaped the wreckage, she told the pilot of her true identity and goal.
Before Mar-Vell could destroy the engine with her Kree Pistol, she was shot and killed by Yon-Rogg. Danvers, in shock of the death of her mentor, grabbed the pistol from her hand and aimed it at Yon-Rogg. After a brief standoff, Danvers fired at the Light-Speed Engine, destroying it.
The energy released from the explosion radiated into Danvers, giving her superhuman abilities. Recovering from the explosion, Yon-Rogg was informed by Minn-Erva that Danvers was still breathing and decided to bring her with them back to Hala.
- In the comics, the exploding device Carol Danvers receives her powers from is called the Psyche-Magnitron.