Quantum Field Theta Manipulation
Such field while theorized early was still elusive as it was really hard to experiment with or at least detect with the science of the time. Then Pandora events happened...
The scientists were amazed by the Umbras capability and most speculated that umbras where in fact able to manipulate QTF and thus manipulate his mass and gravity. This prompted a rush to gather corpse or even live specimen of umbras. This proved easier said than done for a long time, but with the rise of the Sisterhood of Edda such corpse where discovered on Titan.
This discovery prompted a massive investment in the QTF research and The Lazarus project make it one of its top priority. Only a few years after that a joint release by Lazarus Research and The Martian United Armory was presented to the world.
In it was a working plan for building a massive structure using newly created elements to manipulate QTF. With it, one can modify ( more like rewrite entirely ) the mass of any particle. This first working prototype was a fusion reactor using QTF containment to achieve fusion of heavy elements.
Such a reactor could provide more energy than one can dream of and thus render dreams like terraformation or massive spaceship design feasible. The humanity as a whole starred in awe as the newly born Union of Martian Republics used two fusion nuke to inject the necessary energy into the system. Much to the surprise of everyone except the scientist working on it the containment stay in one piece and the reactor soon started to output massive amount of hydrogen and oxygen in the Martian atmosphere.
Since then QTF manipulation is the bread and butter of most high power application, enabling a new revolution in human technologies, Solving once and for all the energy need of humanity
However, the sheer size and cost of the industrial process for making QTF parts make them excessively pricey