Does what it says on the tin: E=mc^2, so clearly if you pour enough energy into something, you'll get some matter, right?

Warning: If your base makes 1,000 GW of power (1TW) and pours it ALL into Einstein Factories, it will produce one kilogram of matter in 25 hours. Real time.

Credits/Acknowledgements:

Einstein Factory Graphics

The Einstein Factory's Graphics were provided by Hurricane through their figma. (At time of writing: It's listed as "Quantum stabilizer".)
Hurricane's figma
Hurricane's mod portal page
Hurricane's mod portal page also lists their discord.