The AFWG (Anti-Force Wave Generator)
in my Storyarc a pair of Je´daii were de-carbonized after a slumber of 10k+ years, by the Jedi-Order of the Old Republic, history tells that they were some what unstable and the jedi scientists worried about theire strenght in the force, trapping them again in the freezing cage of eternal slumber...
...until the year of the destruction of Alderaan, somehow the enormous disturbance in the force let the male je´daii regain consciousness, using the force to free him and his female partner.
Now irritated by the way the force is of balanced and driven by a fair amount of anger and a thirst for revenge the both decide that there is only one way to bringbalance back to the galaxy: The Anti-Force Wave Generator!
mainly a device of the old je´daii Force alchemy it consits out of different materials an force-relics.
once the device is finished it will be used on Tython to reactivate the old Tho Yor and the Hyperspacegates of the Lost Ones. Eventually destroying the Moons Ashla and Bogdan while sending the Anti-Force Wave through the Hyperspacegate all over the galaxis, destroying all connections between the force and the living beeings. Strong force sensitive beeings like the remaining Jedi or the Sithlords, would proberbly die due to the shock of beeing sliced brutal from their powersource. Hole species like the Ysalamiri or the Vornskr will be become extincted with in minutes, force Storms will break out where ever is alot of living force and all beeings in the galaxy that can survive this force armageddon will be force blind and deconnected to this force (like the Yhuzaan Vong)
The Drawback: To Activated the AFWG you need to be force sensitive yourself and since you have to be on Tython while the moons will colliding and bringing the planet itself down... well letß´s say it´s a one time use only
My players always stumble across signs of those two je´daii an will eventually find out that those two aren´t all that good it sometimes seems.